essay in text citation

In-Text Citations: An Overview

In-text citations are brief, unobtrusive references that direct readers to the works-cited-list entries for the sources you consulted and, where relevant, to the location in the source being cited.

An in-text citation begins with the shortest piece of information that di­rects your reader to the entry in the works-cited list. Thus, it begins with what ever comes first in the entry: the author’s name or the title (or descrip­tion) of the work. The citation can appear in your prose or in parentheses.

Citation in prose  Naomi Baron broke new ground on the subject. Parenthetical citation At least one researcher has broken new ground on the subject (Baron). Work cited Baron, Naomi S. “Redefining Reading: The Impact of Digital Communication Media.” PMLA , vol. 128, no. 1, Jan. 2013, pp. 193–200. 

When relevant, an in-text citation also has a second component: if a specific part of a work is quoted or paraphrased and the work includes a page number, line number, time stamp, or other way to point readers to the place in the work where the information can be found, that location marker must be included in parentheses.

Parenthetical citation According to Naomi Baron, reading is “just half of literacy. The other half is writing” (194).

The author or title can also appear alongside the page number or other loca­tion marker in parentheses.

Parenthetical citation Reading is “just half of literacy. The other half is writing” (Baron 194).

All in-text references should be concise. Avoid, for instance, providing the author’s name or title of a work in both your prose and parentheses.

Citation (incorrect) According to Naomi Baron, reading is “just half of literacy. The other half is writing” (Baron 194). Citation (correct) According to Naomi Baron, reading is “just half of literacy. The other half is writing” (194).

For more on what to include in an in-text citation and how to style it, see sections 6.3–6.30 of the ninth edition of the MLA Handbook ).

56 Comments

Brandi unruh 10 april 2021 at 11:04 am.

Hello! I am a high school English teacher trying to answer a question that came up during our research unit. I can’t seem to find a definitive answer online. When using a shortened title in an in-text citation, does an ellipsis need to be included? For example, if the title was “The Problem of Poverty in America: A Historical and Cultural Analysis”, would the in-text citation be (“The Problem of Poverty in America...”) or (“The Problem of Poverty in America”)? Thank you for your time and expertise!

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Laura Kiernan 12 April 2021 AT 11:04 AM

No, an ellipsis would not be used in an in-text citation. We provide extensive guidance on shortening titles in 6.10 of the new ninth edition of the MLA Handbook .

angel 10 May 2021 AT 02:05 PM

hii How to write an in text citation of an entry from encyclopedia which has an editor but no separate authors for each entry ?

William Feeler 11 May 2021 AT 01:05 PM

I see no mention of paragraph numbers for unpaginated prose or sections/lines for drama. are these practices gone?

Laura Kiernan 18 May 2021 AT 01:05 PM

This post provides a general overview of our approach to in-text citations. The complete guidelines appear in sections 6.1–6.30 of the ninth edition of the MLA Handbook .

Vonceil Park 11 May 2021 AT 01:05 PM

Dear MLA Staff, A professor at my College demands students to provide paragraph number in the in-text citation for online articles that have no page number nor paragraph number. Do we just count the paragraph number and put them in the parenthesis, for example: (para. 3)?

Laura Kiernan 18 May 2021 AT 12:05 PM

Thank you for your question. Your approach to modifying our style in accordance with your professor's instructions works, but we would suggest confirming that styling with your professor.

Arathi Babu 17 May 2021 AT 08:05 AM

How to write an in text citation of an unsigned entry from a reference work?

Laura Kiernan 08 June 2021 AT 11:06 AM

If the entry was in a print work, the in-text citation would include the entry’s title or a shortened version of the entry’s title and the page number of the quotation. If the entry was in a reference work without page numbers, the in-text citation should just contain the title or shortened title of the entry.

Sethu 17 May 2021 AT 02:05 PM

For example: Can I give an in-text citation like the following: Shakespeare, in his work Hamlet, quotes: "To be or not to be" (7).

For citing commonly studied verse works, see 6.22 in the ninth edition of the MLA Handbook .

Trinity Klein 21 May 2021 AT 11:05 AM

Can you please help with proper in-text citation placement for an embedded quotation? Does the citation come immediately after the quotation or at the very end of the sentence? For example, is this correct: He asks her to take him home “in the voice of a child afraid of the dark” which comes as a shock to Scout because he has so long held a bold and rebellious reputation (372). Or should the (372) come immediately after ...dark"...? Thank you!

For more information about the placement of a parenthetical citations, see 6.43 in the ninth edition of the MLA Handbook .

Karima 30 May 2021 AT 05:05 PM

Dear MLA staff, 1) In case i am quoting from multiple sources by the same author, am i required to introduce again the source i am quoting from in the beginning of my sentence? (Quotes are used in multiple paragraphs)

For guidance on citing multiple sources by the same author, see 6.8 in the ninth edition of the MLA Handbook .

Yves 23 June 2021 AT 06:06 PM

Hello, is there a specific rule about how to format a range of page numbers in the parenthetical citation? For example, could (Eden 44-45) be written as (Eden 44-5), or is only one example correct?

Laura Kiernan 24 September 2021 AT 02:09 PM

For information about styling number ranges, see section 2.139 of the ninth edition of the MLA Handbook .

Faliravo 11 August 2021 AT 05:08 AM

Good morning MLA team, My professor insists that I include the year of publication for in-text citations. Is it going to be okay if I insert the year between the author and the page number?

Thank you very much for your consideration.

Laura Kiernan 24 September 2021 AT 01:09 PM

Your approach to modifying our style in accordance with your professor’s instructions works, but we would suggest confirming that styling with your professor.

Pauline 14 September 2021 AT 11:09 PM

How do I cite an entire work. For example, if I want to say Toni Morrison's the "Bluest Eye" has been used as a textbook for many English literature classes, I suppose I shouldn't put any page number in the parenthetical citation. But I can't find any MLA references on this.

See section 4.14 of the ninth edition of the MLA Handbook .

myron glassenberg 04 February 2022 AT 01:02 PM

if source is the whole book, how do I cite in text and in works cited pages. e.g. freud (no page number) Freud , ( 1892) The Pleasure Principle.

Rita Rozzi 20 September 2023 AT 07:09 PM

There is no section 4.14 in the ninth edition. Do you have any updated information? Thank you.

Laura Kiernan 21 September 2023 AT 03:09 PM

Section 4.14, which is titled "Passing Mentions," can be found in chapter 4 of the ninth edition of the handbook.

Lauren McFall 13 October 2021 AT 02:10 PM

Students often refer to the same source consecutively across more than one sentence. I'm having a hard time finding information about the preferred approach according to the MLA. As a parallel, APA makes a specific recommendation - "cite the source in the first sentence in which it is relevant and do not repeat the citation in subsequent sentences as long as the source remains clear and unchanged" https://apastyle.apa.org/style-grammar-guidelines/citations/appropriate-citation

Laura Kiernan 20 October 2021 AT 04:10 PM

See 6.45 of the ninth edition of the MLA Handbook .

Ruth Schafer 01 December 2022 AT 07:12 PM

6.45 out of the MLA Handbook's ninth edition does not provide an example of how to cite a multi-sentence paraphrase when using an unpaginated source. Can you give an example of how to cite a multi-sentence paraphrase where the source does not have published page numbering?

Should I introduce the source in my prose and then again at the end of the multi-sentence paraphrase in parentheses when I have finished citing the paraphrase? Example: John Smith from Smith Architecture explains that crawl space foundations are...blah blah blah. These foundations are most commonly used in midwestern constructions where the frost line is...blah, blah, blah. Keep writing the paraphrase and then at the end of the final sentence instead of a page citation write the author's last name (Smith). This way if you switch to a different source, at least the reader knows that you have finished with the Smith source and have moved on to your own commentary or another source's information. Usually, I'd use a page citation at the end of the paraphrase, but when dealing with a source that does not have page numbering, I'm unsure what to do.

Lizzie 18 October 2021 AT 10:10 PM

If I only use textual evidence from the novel I'm examining, do I need to include the authors name with each in text citation? There are no other works cited, so it seems redundant/clutter-y to me

Kayden 29 October 2021 AT 05:10 PM

If I'm trying to cite multiple paragraphs from the same source would it be correct to say (par. 3 and 13) or should it be (par. 3, 13) and is it different if they are next to each other too like (par. 6-7) or (par. 6 and 7).

Laura Kiernan 04 November 2021 AT 11:11 AM

See sections 6.18–6.20 of the ninth edition of the MLA Handbook .

Rachel 17 November 2021 AT 01:11 PM

When citing from an online source without pagination, if you include the author's name in the introduction to the quote, do you need to include anything in parentheses like the article title?

Laura Kiernan 22 November 2021 AT 12:11 PM

See section 6.26 of the ninth edition of the MLA Handbook .

July 25 November 2021 AT 05:11 PM

When quoting an online source (e.g. a website), do I have to indicate the fact that it's an online source in the in-text-citations as in (Name [online]) or is the author's name enough?

Thank you in advance for your answer.

Laura Kiernan 29 November 2021 AT 10:11 AM

According to MLA style, an in-text citation for an online work should not note that the work is online.

Pinkie 19 March 2022 AT 08:03 PM

If I'm writing a response paper, and I need to summarize the whole article to introduce it, then should I use in-text citation?

Laura Kiernan 25 March 2022 AT 01:03 PM

For guidance on paraphrasing, see sections 4.5–4.8 of the ninth edition of the MLA Handbook .

Kay 09 April 2022 AT 06:04 PM

Hi, am I supposed to include the DOI when one is available in the citation? If I cite the print version of a journal article that has a DOI, still include the DOI in the citation? Thank you!

Laura Kiernan 11 April 2022 AT 11:04 AM

Thank you for your questions. For guidance on including a DOI in your works-cited-list entry, see sections 5.84 and 5.93 in the ninth edition of the MLA Handbook .

Mike 16 April 2022 AT 05:04 PM

Website in-text Citation...

When I'm writing an in-text citation for a website, I'm seeing all manner of different things to include. Do I need to add the author name and year of publishing for the article?\ Do I just need the website name? I'm not really understanding what I need to add or obtain for such a citation within the text I'm writing.

I'm writing a book on my life, and I'm quoting a particular webpage to show one particular angle of an argument I'm making, and, of course, it's not common knowledge, so I want to make sure that I follow all the rules for this kind of thing, so I don't get in trouble with the author(s) of the sources I have quoted from...

Laura Kiernan 18 April 2022 AT 02:04 PM

Thank you for your questions about MLA style. For guidance on in-text citations for web pages, see section 6.26 of the ninth edition of the MLA Handbook .

Cynthia 21 May 2022 AT 10:05 PM

When you're doing an In-text citations do you put the quotations over the chapter title and then quotations over what you get from the text or do you italicize the title?

Laura Kiernan 25 May 2022 AT 03:05 PM

Thank you for your question. For guidance on how to style chapter titles, see 2.109 of the ninth edition of the MLA Handbook .

Napatsi 15 August 2022 AT 07:08 PM

I'm trying to find how to put in the in-text citation for a UN declaration article but can only find the "Resolutions of International Governing Bodies" on page 446 of the 9th edition but not how to out it in without an author.

Kim 27 September 2022 AT 12:09 PM

I'm quoting a passage from an unpublished manuscript, and it is not the only work I'm citing by the author, but the only one without a year. So using "Smith 1995, 82" is not possible. What would an in-text citation for this case look like?

Jen 17 November 2022 AT 08:11 PM

How do I cite a news cast for in-text citation like ABC News?

Samantha 04 December 2022 AT 05:12 PM

Hi, For MLA format, should a quote where you need to de-capitalize the first letter be written as "you want" or "(y)ou want". Thanks!

Laura Kiernan 07 December 2022 AT 01:12 PM

Thank you for your question. For guidance on how to indicate that you have lowercased the first letter of a quotation, see 6.56 of the ninth edition of the MLA Handbook .

Maria Albeti 07 February 2023 AT 01:02 PM

Stewart, David W. Focus groups. In: Frey, B.B. (ed.) The SAGE Encyclopedia of Educational Research, Measurement, and Evaluation, vol. 2, pp. 687–692. Thousand Oaks: Sage Publications 2018 In this case, how is the correct form to write, because the article is IN the the book?

Eros Karadzhov 15 February 2023 AT 02:02 PM

If we have a sentence that is a statement, but at the end we quote a question, which punctuation mark do we keep, the question mark or the period; maybe both? Example: (1) The author ends his poem with the following question on purpose: "Or does it explode?" (Hughes 11). (2) The author ends his poem with the following question on purpose: "Or does it explode" (Hughes 11)?

Which would be correct, or maybe both are wrong?

Thank you in advance!

Laura Kiernan 16 February 2023 AT 03:02 PM

Thank you for your question. For guidance on quotations ending in a question mark, see section 6.53 of the ninth edition of the MLA Handbook .

Anonymous 08 March 2023 AT 05:03 PM

What about online articles with no known author or multiple authors? What should the in-text citation look like?

Maria 25 March 2023 AT 04:03 PM

Please settle a dispute with my colleagues. I encourage composition students to avoid listing the title of journal articles within the essay unless it is especially relevant because it clutters their arguments. I came to this conclusion from my interpretation of this statement from MLA: "All in-text references should be concise. Avoid, for instance, providing the author’s name or title of a work in both your prose and parentheses." Could someone please provide an answer or further clarification?

Erika Suffern 30 March 2023 AT 04:03 PM

You are right to identify a principle of concision in our guidelines. That said, it is not wrong to mention a title in prose, but it should be done, as you note, when relevant–not as a de rigeur practice or for “filler.” As Eric Hayot notes in The Elements of Academic Style: Writing for the Humanities (Columbia UP, 2014), “giving the title” in prose “suggests fuller forthcoming treatment” (159). Another reason for including the title in prose might be to call attention to something about it. Many writers who do mention a title in prose fear having an incomplete citation and are tempted also to include the title in a parenthetical reference, which is unnecessary.

Jay 29 April 2023 AT 12:04 AM

How do I in-text cite a direct quote from the introduction of an ebook with no page numbers? Would I write (Author "Introduction") or just write (Author)?

Kiara 11 February 2024 AT 03:02 PM

Hello! I am a university student who is currently creating works cited entries and in-text citations for a reflection essay. How do I properly cite professor and peer comments?

Therese Willis 30 July 2024 AT 10:07 PM

What is the proper way to write MLA in-text citattion from a website for this: According to an article titled “Caitlin Clark: Changing the Game” (McCord, 2024), Clark put women’s basketball on the map and taught millions what it meant to love the sport. She has shown off her iconic logo shot and her ability to control the court when needed, all while maintaining a professional image.

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• Harvard In-Text Citation | A Complete Guide & Examples

Harvard In-Text Citation | A Complete Guide & Examples

Published on 30 April 2020 by Jack Caulfield . Revised on 5 May 2022.

An in-text citation should appear wherever you quote or paraphrase a source in your writing, pointing your reader to the full reference .

In Harvard style , citations appear in brackets in the text. An in-text citation consists of the last name of the author,  the year of publication, and a page number if relevant.

Up to three authors are included in Harvard in-text citations. If there are four or more authors, the citation is shortened with et al .

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Table of contents

Including page numbers in citations, where to place harvard in-text citations, citing sources with missing information, frequently asked questions about harvard in-text citations.

When you quote directly from a source or paraphrase a specific passage, your in-text citation must include a page number to specify where the relevant passage is located.

Use ‘p.’ for a single page and ‘pp.’ for a page range:

• Meanwhile, another commentator asserts that the economy is ‘on the downturn’ (Singh, 2015, p. 13 ).
• Wilson (2015, pp. 12–14 ) makes an argument for the efficacy of the technique.

If you are summarising the general argument of a source or paraphrasing ideas that recur throughout the text, no page number is needed.

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When incorporating citations into your text, you can either name the author directly in the text or only include the author’s name in brackets.

Naming the author in the text

When you name the author in the sentence itself, the year and (if relevant) page number are typically given in brackets straight after the name:

Naming the author directly in your sentence is the best approach when you want to critique or comment on the source.

Naming the author in brackets

When you  you haven’t mentioned the author’s name in your sentence, include it inside the brackets. The citation is generally placed after the relevant quote or paraphrase, or at the end of the sentence, before the full stop:

Multiple citations can be included in one place, listed in order of publication year and separated by semicolons:

This type of citation is useful when you want to support a claim or summarise the overall findings of sources.

Common mistakes with in-text citations

In-text citations in brackets should not appear as the subject of your sentences. Anything that’s essential to the meaning of a sentence should be written outside the brackets:

• (Smith, 2019) argues that…
• Smith (2019) argues that…

Similarly, don’t repeat the author’s name in the bracketed citation and in the sentence itself:

• As Caulfield (Caulfield, 2020) writes…
• As Caulfield (2020) writes…

Sometimes you won’t have access to all the source information you need for an in-text citation. Here’s what to do if you’re missing the publication date, author’s name, or page numbers for a source.

If a source doesn’t list a clear publication date, as is sometimes the case with online sources or historical documents, replace the date with the words ‘no date’:

When it’s not clear who the author of a source is, you’ll sometimes be able to substitute a corporate author – the group or organisation responsible for the publication:

When there’s no corporate author to cite, you can use the title of the source in place of the author’s name:

No page numbers

If you quote from a source without page numbers, such as a website, you can just omit this information if it’s a short text – it should be easy enough to find the quote without it.

If you quote from a longer source without page numbers, it’s best to find an alternate location marker, such as a paragraph number or subheading, and include that:

A Harvard in-text citation should appear in brackets every time you quote, paraphrase, or refer to information from a source.

The citation can appear immediately after the quotation or paraphrase, or at the end of the sentence. If you’re quoting, place the citation outside of the quotation marks but before any other punctuation like a comma or full stop.

In Harvard referencing, up to three author names are included in an in-text citation or reference list entry. When there are four or more authors, include only the first, followed by ‘ et al. ’

In Harvard style , when you quote directly from a source that includes page numbers, your in-text citation must include a page number. For example: (Smith, 2014, p. 33).

You can also include page numbers to point the reader towards a passage that you paraphrased . If you refer to the general ideas or findings of the source as a whole, you don’t need to include a page number.

When you want to use a quote but can’t access the original source, you can cite it indirectly. In the in-text citation , first mention the source you want to refer to, and then the source in which you found it. For example:

It’s advisable to avoid indirect citations wherever possible, because they suggest you don’t have full knowledge of the sources you’re citing. Only use an indirect citation if you can’t reasonably gain access to the original source.

In Harvard style referencing , to distinguish between two sources by the same author that were published in the same year, you add a different letter after the year for each source:

• (Smith, 2019a)
• (Smith, 2019b)

Add ‘a’ to the first one you cite, ‘b’ to the second, and so on. Do the same in your bibliography or reference list .

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In-Text Citations

In scholarly writing, it is essential to acknowledge how others contributed to your work. By following the principles of proper citation, writers ensure that readers understand their contribution in the context of the existing literature—how they are building on, critically examining, or otherwise engaging the work that has come before.

APA Style provides guidelines to help writers determine the appropriate level of citation and how to avoid plagiarism and self-plagiarism.

We also provide specific guidance for in-text citation, including formats for interviews, classroom and intranet sources, and personal communications; in-text citations in general; and paraphrases and direct quotations.

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In-text citations are inserted in the body of your research paper to briefly document the source of your information. 

• In-text citations in MLA style follow the general format of author's last name followed by a page number enclosed in parentheses. Here is an example: "Here's a direct quote" (Smith 8).
• If the author's name is not given, use the first word (or words) of the title. Follow the same formatting that is used in the works-cited list, such as quotation marks. Here is an example: This is a paraphrase ("Trouble" 22).
• If the source does not have page numbers (for example, some online articles, websites and e-books), only include the author's name for the in-text citation. Do not estimate or make up page numbers.  
• In-text citations point the reader to the works-cited list, which is located at the end of your paper, for more complete bibliographic information.

Repeated Use of Sources

If you use information from a single source more than once in succession (i.e., no other sources referred to in between), you can use a simplified in-text citation. Here is an example:

Cell biology is an area of science that focuses on the structure and function of cells (Smith 15). It revolves around the idea that the cell is a "fundamental unit of life" (17).

  Note: If using this simplified in-text citation creates ambiguity regarding the source being referred to, use the full in-text citation format.

In-Text Citation Formatting and Examples

Format:  (Author's Last Name Page Number)

Example: (Hunt 358)

Two Authors

Format:  (Author's Last Name and Author's Last Name Page Number)

Example: (Case and Daristotle 57)

Three or More Authors

Format:   (Author's Last Name et al. Page Number)

Example: (Case et al. 57)

Unknown Author

Where you would normally put the author's last name, instead use the first one, two, or three words from the title. Do not use  initial articles such as "A", "An" or "The". Provide enough words to clarify which sources from your works-cited list that you are referencing. 

Follow the formatting of the title. For example, if the title in the works-cited list is in italics, italicize the words from the title in the in-text citation, and if the title in the works-cited list is in quotation marks, put quotation marks around the words from the title in the in-text citation.

Format: (Title Page Number)

Examples : 

( Cell Biology 12)

("Nursing" 12)

Multiple Sources

To cite more than one source when you are paraphrasing, separate the in-text citations with a semi-colon.

Format: (Author's Last Name Page Number; Author's Last Name Page Number).

(Smith 42; Bennett 71). 

( It Takes Two ; Brock 43).

 Note: In MLA style, the sources within the in-text citation do not need to be in alphabetical order.

Works Quoted in Another Source

Sometimes an author of a book, article or website will mention another person's work by using a quotation or paraphrased idea from that source. (This may be a secondary source.) For example, the Kirkey article you are reading includes a quotation by Smith that you would like to include in your essay. The basic rule is that in both your Works-Cited List and in-text citation you will still cite Kirkey. Kirkey will appear in your Works Cited list – NOT Smith. Add the words "qtd. in" to your in-text citation.

Examples of in-text citations:

According to a study by Smith (qtd. in Kirkey) 42% of doctors would refuse to perform legal euthanasia.

Smith (qtd. in Kirkey) states that “even if euthanasia was legal, 42% of doctors would be against this method of assisted dying” (A.10).

Example of Works Cited List citation:

Kirkey, Susan. "Euthanasia."   The Montreal Gazette , 9 Feb. 2013, p. A.10. Canadian Newsstand Major Dailies.

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Using In-text Citation

Include an in-text citation when you refer to, summarize, paraphrase, or quote from another source. For every in-text citation in your paper, there must be a corresponding entry in your reference list.

APA in-text citation style uses the author's last name and the year of publication, for example: (Field, 2005). For direct quotations, include the page number as well, for example: (Field, 2005, p. 14). For sources such as websites and e-books that have no page numbers , use a paragraph number, for example: (Field, 2005, para. 1). More information on direct quotation of sources without pagination is given on the APA Style and Grammar Guidelines web page.

Example paragraph with in-text citation

A few researchers in the linguistics field have developed training programs designed to improve native speakers' ability to understand accented speech (Derwing et al., 2002; Thomas, 2004). Their training techniques are based on the research described above indicating that comprehension improves with exposure to non-native speech.   Derwing et al. (2002) conducted their training with students preparing to be social workers, but note that other professionals who work with non-native speakers could benefit from a similar program.

Derwing, T. M., Rossiter, M. J., & Munro, M. J. (2002). Teaching native speakers to listen to foreign-accented speech.  Journal of Multilingual and Multicultural Development , 23 (4), 245-259.

Thomas, H. K. (2004).  Training strategies for improving listeners' comprehension of foreign-accented speech  (Doctoral dissertation). University of Colorado, Boulder.

Citing Web Pages In Text

Cite web pages in text as you would any other source, using the author and date if known. Keep in mind that the author may be an organization rather than a person. For sources with no author, use the title in place of an author.

For sources with no date use n.d. (for no date) in place of the year: (Smith, n.d.). For more information on citations for sources with no date or other missing information see the page on missing reference information on the APA Style and Grammar Guidelines web page. 

Below are examples of using in-text citation with web pages.

Web page with author:

In-text citation

Heavy social media use can be linked to depression and other mental disorders in teens (Asmelash, 2019).

Reference entry

Asmelash, L. (2019, August 14). Social media use may harm teens' mental health by disrupting positive activities, study says . CNN. https://www.cnn.com/2019/08/13/health/social-media-mental-health-trnd/index.html

Web page with organizational author:

More than 300 million people worldwide are affected by depression (World Health Organization, 2018).

World Health Organization. (2018, March 22).  Depression . https://www.who.int/en/news-room/fact-sheets/detail/depression

Web page with no date:

Establishing regular routines, such as exercise, can help survivors of disasters recover from trauma (American Psychological Association [APA], n.d.).

American Psychological Association. (n.d.). Recovering emotionally from disaste r. http://www.apa.org/helpcenter/recovering-disasters.aspx

General Guidelines

In-text references should immediately follow the title, word, or phrase to which they are directly relevant, rather than appearing at the end of long clauses or sentences. In-text references should always precede punctuation marks. Below are examples of using in-text citation.

Author's name in parentheses:

One study found that the most important element in comprehending non-native speech is familiarity with the topic (Gass & Varonis, 1984).

Author's name part of narrative:

Gass and Varonis (1984) found that the most important element in comprehending non-native speech is familiarity with the topic.

Group as author: First citation: (American Psychological Association [APA], 2015) Subsequent citation: (APA, 2015)

Multiple works: (separate each work with semi-colons)

Research shows that listening to a particular accent improves comprehension of accented speech in general (Gass & Varonis, 1984; Krech Thomas, 2004).

Direct quote: (include page number and place quotation marks around the direct quote)

One study found that “the listener's familiarity with the topic of discourse greatly facilitates the interpretation of the entire message” (Gass & Varonis, 1984, p. 85).

Gass and Varonis (1984) found that “the listener’s familiarity with the topic of discourse greatly facilitates the interpretation of the entire message” (p. 85).

Note:  For direct quotations of more than 40 words , display the quote as an indented block of text without quotation marks and include the authors’ names, year, and page number in parentheses at the end of the quote. For example:

This suggests that familiarity with nonnative speech in general, although it is clearly not as important a variable as topic familiarity, may indeed have some effect. That is, prior experience with nonnative speech, such as that gained by listening to the reading, facilitates comprehension. (Gass & Varonis, 1984, p. 77)

Works by Multiple Authors

APA style has specific rules for citing works by multiple authors. Use the following guidelines to determine how to correctly cite works by multiple authors in text. For more information on citing works by multiple authors see the APA Style and Grammar Guidelines page on in-text citation .

Note: When using multiple authors' names as part of your narrative, rather than in parentheses, always spell out the word and. For multiple authors' names within a parenthetic citation, use &.

One author: (Field, 2005)

Two authors: (Gass & Varonis, 1984)

Three or more authors:   (Tremblay et al., 2010)

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APA 7th Edition Style Guide

• In-Text Citations
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Video: The Basics of APA In-text Citations

About In-Text Citations

When writing your papers, it essential to recognize other authors who contributed to your work and avoid plagiarism. 

Use in-text citations when:

• paraphrasing
• directly quoting 
• referring to another person’s writing
• referring to data from prior studies
• reusing tables, figures, images, or passages

These should always include the author’s last name and year. When using a direct quote, also include the page number.

Types of In-Text Citation

• Paraphrasing or Summarizing
• Missing Information

When paraphrasing or summarizing information, in-text citations must include the author's last name and year of publication. This will be in parenthesis at the end of a sentence, with a space between the name and year, and a comma after the name. 

Example 1: single author

Falsely balanced news coverage can distort the public’s perception of expert consensus on an issue (Koehler, 2016).

Example 2: more than one author

Two authors: (Koehler & Smith, 2016)​

Three or more authors: (Koehler et al., 2016)

As an alternative to parenthetical citations, you can cite the source in your narrative, which allows you to incorporate the authors more closely into your discussion:

Example 3: narrative citation

Koehler (2016) noted the dangers of falsely balanced news coverage.​

When using direct quotations in your paper, your in-text citation should also include a page number when available. The page number will come after the year, with a comma after the year. Longer quotations are to be formatted as a block quotation, meaning the entire quotation starts on a separate line and is indented 0.5 inches. Quotations can also be in narrative format. 

Example 1: short quotation (less than 40 words)

Effective teams can be difficult to describe because “high performance along one domain does not translate to high performance along another” (Ervin et al., 2018, p. 470).​

Example 2: block quotation (40 or more words)

Researchers have studied how people talk to themselves:​

​Inner speech is a paradoxical phenomenon. It is an experience that is central to many people’s everyday lives, and yet it presents considerable challenges to any effort to study it scientifically. Nevertheless, a wide range of methodologies and approaches have combined to shed light on the subjective experience of inner speech and its cognitive and neural underpinnings (Alderson-Day & Fernyhough, 2015, p. 957).

Example 3: block quotation in narrative form

Flores et al. (2018) described how they addressed potential researcher bias when working with an intersectional community of transgender people of color:​

Everyone on the research team belonged to a stigmatized group but also held privileged identities. Throughout the research process, we attended to the ways in which our privileged and oppressed identities may have influenced the research process, findings, and presentation of results. (p. 311)

Use the chart below to determine what to do if you are missing information for in-text citation.

Online Resource

• APA.org: In-Text Citations View elements to utilizing in-text citations, including paraphrasing, parenthetical vs. narrative in-text citations, secondary sources, and more.
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Essay Writing: In-Text Citations

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In-text Citations

What are In-Text Citations?

You must cite (give credit) all information sources used in your essay or research paper whenever and wherever you use them.

When citing sources in the text of your paper, you must list:

● The author’s last name

● The year  the information was published.

Types of In-Text Citations: Narrative vs Parenthetical

A  narrative citation gives the author's name as part of the sentence .

• Example of a Narrative Citation: According to Edwards (2017) , a lthough Smith and Carlos's protest at the 1968 Olympics initially drew widespread criticism, it also led to fundamental reforms in the organizational structure of American amateur athletics.

A  parenthetical citation puts the source information in parentheses—first or last—but does not include it in  the narrative  flow.

• Example of a Parenthetical Citation:  Although Tommie Smith and John Carlos paid a heavy price in the immediate aftermath of the protests, they were later vindicated by society at large (Edwards, 2017) .

Full citation for this source (this belongs on the Reference Page of your research paper or essay):

Edwards, H. (2017).  The Revolt of the Black Athlete: 50th Anniversary Edition.  University of Illinois Press.

Sample In-text Citations

Note: This example is a  direct quote. It is an exact quotation directly from the text of the article. All direct quotes should appear in quotation marks: "...."

Try keeping direct quotes to a minimum in your writing. You need to show your understanding of the source material by being able to paraphrase or summarize it. 

List the author’s last name only (no initials) and the year the information was published, like this:

(Dodge, 2008 ). ( Author , Date).

IF you use a direct quote, add the page number to your citation, like this: 

( Dodge , 2008 , p. 125 ).

( Author , Date , page number )

What information should I cite in my paper/essay?

Credit these sources when you mention their information in any way: direct quotation, paraphrase, or summarize.

What should you credit?

Any information that you learned from another source, including:

● statistics

EXCEPTION: Information that is common knowledge: e.g., The Bronx is a borough of New York City.

Quick Sheet: APA 7 Citations

Quick help with apa 7 citations.

• Quick Sheet - Citing Journal Articles, Websites & Videos, and Creating In-Text Citations A quick guide to the most frequently-used types of APA 7 citations.

In-text Citation Tutorial

• Formatting In-text Citations, Full Citations, and Block Quotes In APA 7 Style This presentation will help you understand when, why, and how to use in-text citations in your APA style paper.

Download the In-text Citations presentation  (above)  for an in-depth look at how to correctly cite your sources in the text of your paper.

SIgnal Phrase Activity

Paraphrasing activity from the excelsior owl, in-text citation quiz.

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• Blogs, Podcasts, and Social Media
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• Citation Generators - Problems & Limitations
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• Identifying & Citing Content Marketing
• Indirect Citations, or How to Cite a Quote or Paraphrase from a Source
• In-text Citations: Conveying Credibility
• In-text Citations: Using a Source Multiple Times
• In-text Citations: Principles & Formatting
• References Page: Principles & Formatting
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In-text Citations – Principles and Formatting

The Purpose of In-text Citation

In-text citations 

• give credit to the original author/s; 
• indicate where information from the source both begins and ends in your own sentences and paragraphs;
• direct readers to the correct entry on the References page. In-text citations must match the References list and vice versa.

Attributive tags and in-text citations work together to help “sandwich” information and/or quotations from outside sources. All information between the attributive tag and the parenthetical citation, whether that information is expressed with one word or through multiple sentences, must come from the source indicated by the attributive tag and the parenthetical citation.

The Relationship between In-text Citations and References Entries

In addition, the parenthetical citation must direct readers to the correct source listed on the References page. Therefore, the information that begins the parenthetical citation will match the information that begins the References entry, as in the following example:

According to the Harvard Business Review , failure to “research customer needs” prior to developing products is one of the most avoidable reasons that startup companies flop (Eisenmann, 2021, p. 81).

Eisenmann, T. (2021, May-June).  Why startups fail.  Harvard Business Review, 99 (3), 76-85.

Note the way that the parenthetical citation leads directly to the References entry—both begin with the author’s last name, which will be easy to find in an alphabetized References list.

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Home / Guides / Citation Guides / MLA Format / How to Cite an Essay in MLA

How to Cite an Essay in MLA

The guidelines for citing an essay in MLA format are similar to those for citing a chapter in a book. Include the author of the essay, the title of the essay, the name of the collection if the essay belongs to one, the editor of the collection or other contributors, the publication information, and the page number(s).

Citing an Essay

Mla essay citation structure.

Last, First M. “Essay Title.” Collection Title, edited by First M. Last, Publisher, year published, page numbers. Website Title , URL (if applicable).

MLA Essay Citation Example

Gupta, Sanjay. “Balancing and Checking.” Essays on Modern Democracy, edited by Bob Towsky, Brook Stone Publishers, 1996, pp. 36-48. Essay Database, www . databaseforessays.org/modern/modern-democracy.

MLA Essay In-text Citation Structure

(Last Name Page #)

MLA Essay In-text Citation Example

Click here to cite an essay via an EasyBib citation form.

MLA Formatting Guide

MLA Formatting

• Annotated Bibliography
• Bibliography
• Block Quotes
• et al Usage
• In-text Citations
• Paraphrasing
• Page Numbers
• Sample Paper
• Works Cited
• MLA 8 Updates
• MLA 9 Updates
• View MLA Guide

Citation Examples

• Book Chapter
• Journal Article
• Magazine Article
• Newspaper Article
• Website (no author)
• View all MLA Examples

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To cite your sources in an essay in MLA style, you need to have basic information including the author’s name(s), chapter title, book title, editor(s), publication year, publisher, and page numbers. The templates for in-text citations and a works-cited-list entry for essay sources and some examples are given below:

In-text citation template and example:

For citations in prose, use the first name and surname of the author on the first occurrence. For subsequent citations, use only the surname(s). In parenthetical citations, always use only the surname of the author(s).

Citation in prose:

First mention: Annette Wheeler Cafarelli

Subsequent occurrences: Wheeler Cafarelli

Parenthetical:

….(Wheeler Cafarelli).

Works-cited-list entry template and example:

The title of the chapter is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name. “Title of the Chapter.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Cafarelli, Annette Wheeler. “Rousseau and British Romanticism: Women and British Romanticism.” Cultural Interactions in the Romantic Age: Critical Essays in Comparative Literature , edited by Gregory Maertz. State U of New York P, 1998, pp. 125–56.

To cite an essay in MLA style, you need to have basic information including the author(s), the essay title, the book title, editor(s), publication year, publisher, and page numbers. The templates for citations in prose, parenthetical citations, and works-cited-list entries for an essay by multiple authors, and some examples, are given below:

For citations in prose, use the first name and surname of the author (e.g., Mary Strine).

For sources with two authors, use both full author names in prose (e.g., Mary Strine and Beth Radick).

For sources with three or more authors, use the first name and surname of the first author followed by “and others” or “and colleagues” (e.g., Mary Strine and others). In subsequent citations, use only the surname of the first author followed by “and others” or “and colleagues” (e.g., Strine and others).

In parenthetical citations, use only the author’s surname. For sources with two authors, use two surnames (e.g., Strine and Radick). For sources with three or more author names, use the first author’s surname followed by “et al.”

First mention: Mary Strine…

Subsequent mention: Strine…

First mention: Mary Strine and Beth Radick…

Subsequent mention: Strine and Radick…

First mention: Mary Strine and colleagues …. or Mary Strine and others

Subsequent occurrences: Strine and colleagues …. or Strine and others

…. (Strine).

….(Strine and Radick).

….(Strine et al.).

The title of the essay is enclosed in double quotation marks and uses title case. The book or collection title is given in italics and uses title case.

Surname, First Name, et al. “Title of the Essay.” Title of the Book , edited by Editor(s) Name, Publisher, Publication Year, page range.

Strine, Mary M., et al. “Research in Interpretation and Performance Studies: Trends, Issues, Priorities.” Speech Communication: Essays to Commemorate the 75th Anniversary of the Speech Communication Association , edited by Gerald M. Phillips and Julia T. Wood, Southern Illinois UP, 1990, pp. 181–204.

MLA Citation Examples

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MLA In-text Citations and Sample Essay 9th Edition

Listing your sources at the end of your essay in the Works Cited is only the first step in complete and effective documentation. Proper citation of sources is a two-part process . You must also cite, in the body of your essay, the source your paraphrased information or where directly quoted material came from. These citations within the essay are called in-text citations . You must cite all quoted, paraphrased, or summarized words, ideas, and facts from sources. Without in-text citations, you are in danger of plagiarism , even if you have listed your sources at the end of the essay. In-text citations point the reader to the sources’ information in the works cited page, so the in-text citation should be the first item listed in the source’s citation on the works cited page, which is usually the author’s last name (or the title if there is no author) and the page number, if provided.

Two Ways to Cite Your Sources In-text

Parenthetical citation.

Cite your source in parentheses at the end of quoted or paraphrased material.

Example with a page number: In regards to paraphrasing, "It is important to remember to use in-text citations for your paraphrased information, as well as your directly quoted material" (Habib 7).

Example without a page number : Paraphrasing is "often the best choice because direct quotes should be reserved for source material that is especially well-written in style and/or clarity" (Ruiz).

Signal Phrase

Within the sentence, through the use of a "signal phrase" which signals to the reader the specific source the idea or quote came from. Include the page number(s) in parentheses at the end of the sentence, if provided.

Example with a page number: According to Habib, "It is important to remember to use in-text citations for your paraphrased information, as well as your directly quoted material" (7).

Example without a page number: According to Ruiz, paraphrasing is "often the best choice because direct quotes should be reserved for source material that is especially well-written in style and/or clarity."

*See our handout "Signal Phrases" for more examples and information on effective ways to use signal phrases for in-text citations.

Do you need to include a page number in your in-text citation?

Printed materials such as books, magazines, journals, or internet and digital sources with PDF files that show an actual printed page number need to have a page number in the citation.

Internet and digital sources with a continuously scrolling page without a page number do not need a page number in the citation.

Commonly used in-text citations in parentheses

Notes on Quotes

Block quotation format.

When using long quotations that are over four lines of prose or over three lines of poetry in length, you will need to use block quotation format. Block format is indented one inch from the margin (you can hit the "tab" button twice to move it one inch). Additionally, block quotes do not use quotation marks, and the parenthetical citation comes after the period of the last sentence. Please see the following sample essay for an example block quote.

Signal Phrase Examples and Ideas

Please see the following sample essay for different kinds of signal phrases and parenthetical in-text citations, which correspond with the sample Works Cited page at the end. The Writing Center also has a handout on signal phrases with many different verb options.

Learn more about the MLA Works Cited page by reviewing this handout .

For information on STLCC's academic integrity policy, check out this website .

How to Write an Academic Essay with References and Citations

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Written by  Scribendi

If you're wondering how to write an academic essay with references, look no further. In this article, we'll discuss how to use in-text citations and references, including how to cite a website, how to cite a book, and how to cite a Tweet, according to various style guides.

You might need to cite sources when writing a paper that references other sources. For example, when writing an essay, you may use information from other works, such as books, articles, or websites. You must then inform readers where this information came from. Failure to do so, even accidentally, is plagiarism—passing off another person's work as your own.

You can avoid plagiarism and show readers where to find information by using citations and references. 

Citations tell readers where a piece of information came from. They take the form of footnotes, endnotes, or parenthetical elements, depending on your style guide. In-text citations are usually placed at the end of a sentence containing the relevant information. 

A reference list , bibliography, or works cited list at the end of a text provides additional details about these cited sources. This list includes enough publication information allowing readers to look up these sources themselves.

Referencing is important for more than simply avoiding plagiarism. Referring to a trustworthy source shows that the information is reliable. Referring to reliable information can also support your major points and back up your argument. 

Learning how to write an academic essay with references and how to use in-text citations will allow you to cite authors who have made similar arguments. This helps show that your argument is objective and not entirely based on personal biases.

How Do You Determine Which Style Guide to Use?

Often, a professor will assign a style guide. The purpose of a style guide is to provide writers with formatting instructions. If your professor has not assigned a style guide, they should still be able to recommend one. 

If you are entirely free to choose, pick one that aligns with your field (for example, APA is frequently used for scientific writing). 

Some of the most common style guides are as follows:

AP style for journalism

Chicago style for publishing

APA style for scholarly writing (commonly used in scientific fields)

MLA style for scholarly citations (commonly used in English literature fields)

Some journals have their own style guides, so if you plan to publish, check which guide your target journal uses. You can do this by locating your target journal's website and searching for author guidelines.

How Do You Pick Your Sources?

When learning how to write an academic essay with references, you must identify reliable sources that support your argument. 

As you read, think critically and evaluate sources for:

Objectivity

Keep detailed notes on the sources so that you can easily find them again, if needed.

Tip: Record these notes in the format of your style guide—your reference list will then be ready to go.

How to Use In-Text Citations in MLA

An in-text citation in MLA includes the author's last name and the relevant page number: 

(Author 123)

How to Cite a Website in MLA

Here's how to cite a website in MLA:

Author's last name, First name. "Title of page."

Website. Website Publisher, date. Web. Date

retrieved. <URL>

With information from a real website, this looks like:

Morris, Nancy. "How to Cite a Tweet in APA,

Chicago, and MLA." Scribendi. Scribendi

Inc., n.d. Web. 22 Dec. 2021.

<https://www.scribendi.com/academy/articles/how_to_cite_a_website.en.html>

How Do You Cite a Tweet in MLA ?

MLA uses the full text of a short Tweet (under 140 characters) as its title. Longer Tweets can be shortened using ellipses. 

MLA Tweet references should be formatted as follows:

@twitterhandle (Author Name). "Text of Tweet." Twitter, Date Month, Year, time of

publication, URL.

With information from an actual Tweet, this looks like:

@neiltyson (Neil deGrasse Tyson). "You can't use reason to convince anyone out of an

argument that they didn't use reason to get into." Twitter, 29 Sept. 2020, 10:15 p.m.,

https://twitter.com/neiltyson/status/1311127369785192449 .

How to Cite a Book in MLA

Here's how to cite a book in MLA:

Author's last name, First name. Book Title. Publisher, Year.

With publication information from a real book, this looks like:

Montgomery, L.M. Rainbow Valley. Frederick A. Stokes Company, 1919.

How to Cite a Chapter in a Book in MLA

Author's last name, First name. "Title of Chapter." Book Title , edited by Editor Name,

Publisher, Year, pp. page range.

With publication information from an actual book, this looks like:

Ezell, Margaret J.M. "The Social Author: Manuscript Culture, Writers, and Readers." The

Broadview Reader in Book History , edited by Michelle Levy and Tom Mole, Broadview

Press, 2015,pp. 375–394.

How to  Cite a Paraphrase in MLA

You can cite a paraphrase in MLA exactly the same way as you would cite a direct quotation. 

Make sure to include the author's name (either in the text or in the parenthetical citation) and the relevant page number.

How to Use In-Text Citations in APA

In APA, in-text citations include the author's last name and the year of publication; a page number is included only if a direct quotation is used: 

(Author, 2021, p. 123)

How to Cite a Website in APA

Here's how to cite a website in APA:

Author, A. A., & Author, B. B. (Year, Month. date of publication). Title of page. https://URL

Morris, N. (n.d.). How to cite a Tweet in APA, Chicago, and MLA. 

https://www.scribendi.com/academy/articles/how_to_cite_a_website.en.html       

Tip: Learn more about how to write an academic essay with  references to websites .

How Do You  Cite a Tweet in APA ?

APA refers to Tweets using their first 20 words. 

Tweet references should be formatted as follows:

Author, A. A. [@twitterhandle). (Year, Month. date of publication). First 20 words of the

Tweet. [Tweet] Twitter. URL

When we input information from a real Tweet, this looks like:

deGrasse Tyson, N. [@neiltyson]. (2020, Sept. 29). You can't use reason to convince anyone

out of an argument that they didn't use reason to get into. [Tweet] Twitter.

https://twitter.com/neiltyson/status/1311127369785192449

How to Cite a Book in APA

Here's how to cite a book in APA:   

Author, A. A. (Year). Book title. Publisher.

For a real book, this looks like:

Montgomery, L. M. (1919). Rainbow valley.

Frederick A. Stokes Company.

How to Cite a Chapter in a Book in APA

Author, A. A. (Year). Chapter title. In Editor Name (Ed.), Book Title (pp. page range).

With information from a real book, this looks like:

Ezell, M. J. M. (2014). The social author: Manuscript culture, writers, and readers. In

Michelle Levy and Tom Mole (Eds.), The Broadview Reader in Book History (pp. 375–

394). Broadview Press.

Knowing how to cite a book and how to cite a chapter in a book correctly will take you a long way in creating an effective reference list.

How to Cite a Paraphrase in APA

You can cite a paraphrase in APA the same way as you would cite a direct quotation, including the author's name and year of publication. 

In APA, you may also choose to pinpoint the page from which the information is taken.

Referencing is an essential part of academic integrity. Learning how to write an academic essay with references and how to use in-text citations shows readers that you did your research and helps them locate your sources.

Learning how to cite a website, how to cite a book, and how to cite a paraphrase can also help you avoid plagiarism —an academic offense with serious consequences for your education or professional reputation.

Scribendi can help format your citations or review your whole paper with our Academic Editing services .

Take Your Essay from Good to Great

Hire an expert academic editor , or get a free sample, about the author.

Scribendi's in-house editors work with writers from all over the globe to perfect their writing. They know that no piece of writing is complete without a professional edit, and they love to see a good piece of writing transformed into a great one. Scribendi's in-house editors are unrivaled in both experience and education, having collectively edited millions of words and obtained numerous degrees. They love consuming caffeinated beverages, reading books of various genres, and relaxing in quiet, dimly lit spaces.

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"The Complete Beginner's Guide to Academic Writing"

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• In-Text Citation and Notes

Citing Sources in the Text of your Paper

When writers use an outside source, they must give credit to the original writer or creator of that source. This also allows a reader to easily make note of the source’s bibliographic entry. Just as each style guide has rules for creating a citation in a bibliography at the end of a text, each guide also has certain rules for citing the use of sources within the text of the essay.

The following are basic guidelines for citing sources in the text of your paper when using the MLA, APA, Chicago, ASA, or Turabian style guides. These guidelines may not account for every citation situation. Since citing sources is not a creative enterprise, you should consult the appropriate print version of the style guide when you have questions about citation.

MLA: In-Text Citations

MLA citation style requires that writers cite a source within the text of their essay at the end of the sentence in which the source is used.

General Guidance on in-text citations (or reference to your source) The parenthetical reference should be inserted after the last quotation mark but before the period at the end of the sentence.

General Form: (Author Last Name Page #)

Example: (Smith 42)

If two quotations from different sources are used in the same sentence The in-text citation associated with a particular quote should be placed as close to the quotation as possible without interrupting the flow of the sentence.

Example for two sources in one sentence: According to one researcher, “the design thinking process is not meant to be a formula,” (Spencer 58) whereas others might argue that steps and formulas are in fact important like Walker suggests: “following a specific path towards design success is necessary for achieving outlined goals,” (21).

If a paragraph includes several quotations from a single source A single in-text citation may be placed at the end of the paragraph. Page numbers should be included for each quotation organized by placement in the paragraph. In the following example, the first quotation from Smith appeared on page 43 of the text. The second quotation used in the paragraph came from page 12.

Example: (Smith 43, 12)

If the author is included more than once on the Works Cited page The following form should be used. Note that the format of the title on the Works Cited sheet should be mirrored in the in-text citation.

General Form: (Author Last, “Title Fragment” Page #) or (Author Last,  Title Fragment Page #)

Examples: (Smith, “Who Moved” 42) or (Smith, Big Changes 172)

If you have more than one author:

Two: (Brown and Sullivan 42)

Three: (Brown, Sullivan, and Grayson 158)

Four or more: (Brown, et al. 38)

If there is no author A title fragment should be used to make a connection between the use of the source and the citation for the source on the Works Cited page.

General Form: (“Title Fragment” Page #) or ( Title Fragment  Page #)

Examples: (“Library Links” 13) or ( Building a Bookshelf  42)

For more information related to MLA in-text citations, see the MLA Handbook , 8th ed. (pages 54-58). This title is on reserve at the circulation desk at the front of the library on the 3rd floor near the main entrance.

APA: Parenthetical In-Text Citations

To cite a source in the text of an essay, APA advocates two methods: in-text citations and attribution within the essay’s content. in-text citations should be included immediately after the quotation marks used in direct quotations or immediately after the use of the source, even if this means including the parenthetical reference in the middle of the sentence.

The following is the general form for parenthetical citations in APA style:

In-text citation: (Author Last Name, Year of Publication) Example: (Smith, 1988)

To make the citation of the source less distracting The APA also suggests mentioning the author in the essay’s content so that only the year of publication and page number may be required in the parenthetical reference.

Attribution in text: Author Last Name (Year of Publication) has argued this point. Example: Smith (1988) has argued this point.

Page numbers are not required in APA in-text citations. However, it is highly suggested that these be included. To include references to a specific part of the text, add the page number or chapter number after the year.

Examples: Smith (1988, p. 244) has written that… or Smith (1988, chap. 5) has written that…

When a work has two authors Both names should be cited every time the reference is required. Use an ampersand (&) to separate the names of authors. If a text has been authored by more than five individuals, the full listing of authors is not required in the first reference or any subsequent in-text references.

The first mention of the reference: Johnson, Smith, and Brown (1999) agree that… Subsequent mention: Johnson et al. (1999) agree that…

If a group or corporation is the author The full name of the group or corporation should be included in place of the author’s name. If an organization has a recognizable abbreviation, this may be used in subsequent references.

The first mention of the reference: (American Medical Association, 2002) Subsequent mention: (AMA, 2002)

If no author is given for a specific text Use the first couple of words of the title in place of the author’s last name. Title fragments should be formatted using the same punctuation as titles on the References page.

Examples of attribution in the text:

The recent publication  Plagiarism and You  (2002) offers some explanation…

In “Five Ways to Protect Yourself” (2000) one can find…

Examples of attribution at the end of the sentence: ( Plagiarism and You , 2002) or (“Five Ways to Protect Yourself,” 2000)

When no date is given for the publication of a text (as is the case with many websites) Include the abbreviation “n.d.” (which stands for “no date”) in place of the year of publication.

Example: In the article “Five Ways to Protect Yourself” (n.d.) one can find…

For more information related to in-text citations (or in-text referencing) using the APA format, see the Publication Manual of the American Psychological Association , 7th ed. pages 261-269. A copy of this manual is available on the 3rd floor of the library at the circulation desk.

Chicago: Notes Style

In Chicago’s Documentation Style 1, also known as notes form, the use of research sources is indicated in the text with a numerical subscript that corresponds to an entry at the end of the paper. These are called endnotes. Although footnotes (or notes at the bottom of the page) are sometimes required, endnotes have become the predominant form of notes citations.

When using endnotes to indicate the use of research sources, writers must also include a bibliography at the end of the essay. The note and the bibliographic entry include almost identical information but in a different format.

As the formats for notes are contingent on the format of the source for which the note is written, examples of note formats are included with the bibliographic examples available through the  Citing Sources  link. The B: entry would be included in the Bibliography at the end of the paper, while the N: entry gives examples to be used in footnotes or endnotes.

For further information on note format or other issues related to citing sources using the Chicago style, see  The Chicago Manual of Style , 16th ed.

Chicago: Author/Date Style

Documentation 2, also called the Author-Date style, requires the use of parenthetical references in the text of the essay as well as a list of References.

Parenthetical references should be placed at the end of the sentence, before the period, when a resource has been used. If the sentence is either long enough or complex enough so that the cited portion of the sentence is not obvious, the parenthetical reference may instead be inserted immediately after the use of information from the source. Page numbers should be included whenever possible.

General Form:  (Author Last Name Year of Publication, Page #)

Example:  (Smith 1992, 142)

The following examples illustrate parenthetical reference formats for works with more than one author.

(Smith and Johnson 1998, 14)

(Smith, Johnson, and White 2001, 42)

(Smith et al. 1998, 203)

(National Alliance for Social Consideration 1932, 11)

When organizations or corporate authors are the author of a text, the name of the organization may be shortened to its most basic title. Abbreviations for the organization are not encouraged.

In the Chicago style, daily newspapers are rarely included in a list of References. Instead, attribution may be given to information from a daily newspaper in a parenthetical reference.

General Form:  ( Newspaper Name , Day Month Year of Publication, Section and Page #)

Examples:  ( San Antonio Express-News , 2 June 2005, B2)

( New York Times , 2 June 2005, A2)

( Durant Daily Democrat , 2 June 2005, 3)

The Chicago style guide does not offer examples for creating parenthetical references when there is no given author. Standard practice has been to include the title of the work in place of the author. The title should be formatted in the same manner as the formatting in the References list entry.

( Plagiarism and You  2002, 142)

(“Five Ways to Protect Yourself” 2000, 33)

Electronic sources commonly lack a date of publication, as do other sources. When there is no date of publication listed for a source, include the abbreviation “n.d.” in place of the date.

(Statistics for Water Rights n.d.)

For further information on citing sources using the Chicago style, see The Chicago Manual of Style, 16th ed.

If the author’s name is mentioned in the text, use a parenthetical reference to show the year of publication at the end of the sentence.

…Welch contends that this is not the case (1991).

If the author’s name is not mentioned in the text, it should be included with the year of publication within parentheses.

…but it has been argued that this was not the case (Welch 1991).

Page numbers should be included within parentheses after the year of publication. These are separated by a colon and no spaces.

…but it has been argued that this was not the case (Welch 1991:136).

The following forms should be used for multiple authors:

A recent study confirmed her belief (Johnson and Smith 1995:34).

This was reinforced by recent research on the topic (Johnson, Smith, and Marcus 1999)

If a text has more than three authors, the term “et al.” with no additional punctuation marks may be used after the first author listed in the publication credits.

This was not accurate according to a recent study (Johnson et al. 2003).

If multiple sources are cited for the same statement, the author and publication year should be distinguished from other texts with a colon. Cited texts should be arranged by author name or by date; arrangement should be consistent throughout the paper.

Some studies have refuted these arguments (Benson 1993; Nguyen 1999; Brown and Goggans 2000).

For additional information on in-text citation using the ASA style, see the  American Sociological Association Style Guide , Third ed., pp. 45-47.

In the Turabian citation style, writers may use one of two forms in citing their resources: endnotes or author/date parenthetical references. Writers using the Turabian style may use the Chicago formats for both endnotes as references and for parenthetical references. Refer to Kate L. Turabian’s  A Manual for Writers , 7th ed., pp. 143-145 (notes style) and pp. 217-220 (author-date style) for more information.

Citation Sources

• MLA Style, 9th ed.
• APA Style, 7th ed.
• Chicago (Notes-Bibliography Style), 17th ed.
• Chicago (Author-Date Style), 17th ed.
•      See also the online version of the  Chicago Manual of Style
• Turabian (Notes-Bibliography Style), 9th ed.
• Turabian (Author-Date Style), 9th ed.
• ASA Style, 6th ed.

Citing Sources in the Text of a Paper

Including a list of Works Cited at the end of an essay is not enough. Learn how to cite the use of a source in the text of your paper.

Using Information from Sources in the Text of a Paper

Review five different methods for including the words of another writer or information from a research resource into the text of your paper.

Citing Creative Commons Materials

Find models and suggestions for citing Creative Commons images, video clips, music, or other materials.

Suggested Readings on Academic Integrity

Find books, articles and websites which deal with academic integrity issues.

Creating an Annotated Bibliography

Learn how to create an annotated bibliography for a class assignment or for your own use as a researcher and writer.

Learn more about Zotero – a citation management tool to help you keep track of and organize various references for papers and projects.

Avoiding Plagiarism

See Trinity University’s definitions of plagiarism and consider how to avoid these situations.

Detecting Plagiarized Material

Information and links for faculty members and others to use in detecting plagiarized materials.

Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

In-Text Citations: Author/Authors

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Though the APA's author-date system for citations is fairly straightforward, author categories can vary significantly from the standard "one author, one source" configuration. There are also additional rules for citing authors of indirect sources, electronic sources, and sources without page numbers.

A Work by One Author 

The APA manual recommends the use of the author-date citation structure for in-text citation references. This structure requires that any in-text citation (i.e., within the body of the text) be accompanied by a corresponding reference list entry. In the in-text citation provide the surname of the author but do not include suffixes such as "Jr.". 

Citing Non-Standard Author Categories

A work by two authors.

Name both authors in the signal phrase or in parentheses each time you cite the work. Use the word "and" between the authors' names within the text and use the ampersand in parentheses.

A Work by Three or More Authors

List only the first author’s name followed by “et al.” in every citation, even the first, unless doing so would create ambiguity between different sources.

In  et al. , et  should not be followed by a period. Only "al" should be followed by a period.

If you’re citing multiple works with similar groups of authors, and the shortened “et al” citation form of each source would be the same, you’ll need to avoid ambiguity by writing out more names. If you cited works with these authors:

They would be cited in-text as follows to avoid ambiguity:

Since et al. is plural, it should always be a substitute for more than one name. In the case that et al. would stand in for just one author, write the author’s name instead.

Unknown Author

If the work does not have an author, cite the source by its title in the signal phrase or use the first word or two in the parentheses. Titles of books and reports are italicized; titles of articles, chapters, and web pages are in quotation marks. APA style calls for capitalizing important words in titles when they are written in the text (but not when they are written in reference lists).

Note : In the rare case that "Anonymous" is used for the author, treat it as the author's name (Anonymous, 2001). In the reference list, use the name Anonymous as the author.

Organization as an Author

If the author is an organization or a government agency, mention the organization in the signal phrase or in the parenthetical citation the first time you cite the source, just as you would an individual person.

If the organization has a well-known abbreviation, you may include the abbreviation in brackets the first time the source is cited and then use only the abbreviation in later citations. However, if you cite work from multiple organizations whose abbreviations are the same, do not use abbreviations (to avoid ambiguity).

Two or More Works in the Same Parentheses

When your parenthetical citation includes two or more works, order them the same way they appear in the reference list (viz., alphabetically), separated by a semi-colon.

If you cite multiple works by the same author in the same parenthetical citation, give the author’s name only once and follow with dates. No date citations go first, then years, then in-press citations.

Authors with the Same Last Name

To prevent confusion, use first initials with the last names.

Two or More Works by the Same Author in the Same Year

If you have two sources by the same author in the same year, use lower-case letters (a, b, c) with the year to order the entries in the reference list. Use the lower-case letters with the year in the in-text citation.

Introductions, Prefaces, Forewords, and Afterwords

When citing an Introduction, Preface, Foreword, or Afterword in-text, cite the appropriate author and year as usual.

Personal Communication

For interviews, letters, e-mails, and other person-to-person communication, cite the communicator's name, the fact that it was personal communication, and the date of the communication. Do not include personal communication in the reference list.

If using a footnote to reference personal communication, handle citations the same way.

Traditional Knowledge of Indigenous Peoples

When citing information you learned from a conversation with an Indigenous person who was not your research participant, use a variation of the personal communication citation above. Include the person’s full name, nation or Indigenous group, location, and any other relevant details before the “personal communication, date” part of the citation.

Citing Indirect Sources

Generally, writers should endeavor to read primary sources (original sources) and cite those rather than secondary sources (works that report on original sources). Sometimes, however, this is impossible. If you use a source that was cited in another source, name the original source in your signal phrase. List the secondary source in your reference list and include the secondary source in the parentheses. If you know the year of the original source, include it in the citation.

Electronic Sources

If possible, cite an electronic document the same as any other document by using the author-date style.

Unknown Author and Unknown Date

If no author or date is given, use the title in your signal phrase or the first word or two of the title in the parentheses and use the abbreviation "n.d." (for "no date").

Sources Without Page Numbers

When an electronic source lacks page numbers, you should try to include information that will help readers find the passage being cited. Use the heading or section name, an abbreviated heading or section name, a paragraph number (para. 1), or a combination of these.

Note:  Never use the page numbers of webpages you print out; different computers print webpages with different pagination. Do not use Kindle location numbers; instead, use the page number (available in many Kindle books) or the method above. 

Other Sources

The  APA Publication Manual  describes how to cite many different kinds of authors and content creators. However, you may occasionally encounter a source or author category that the manual does not describe, making the best way to proceed unclear.

In these cases, it's typically acceptable to apply the general principles of APA citation to the new kind of source in a way that's consistent and sensible. A good way to do this is to simply use the standard APA directions for a type of source that resembles the source you want to cite. For example, a sensible way to cite a virtual reality program would be to mimic the APA's guidelines for computer software.

You may also want to investigate whether a third-party organization has provided directions for how to cite this kind of source.

• Plagiarism and grammar
• Citation guides

APA Citation Generator

Don't let plagiarism errors spoil your paper, a comprehensive guide to apa citations and format, overview of this guide:.

This page provides you with an overview of APA format, 7th edition. Included is information about referencing, various citation formats with examples for each source type, and other helpful information.

If you’re looking for MLA format , check out the Citation Machine MLA Guide. Also, visit the Citation Machine homepage to use the APA formatter, which is an APA citation generator, and to see more styles .

Being responsible while researching

When you’re writing a research paper or creating a research project, you will probably use another individual’s work to help develop your own assignment. A good researcher or scholar uses another individual’s work in a responsible way. This involves indicating that the work of other individuals is included in your project (i.e., citing), which is one way to prevent plagiarism.

Plagiarism? What is it?

The word plagiarism is derived from the Latin word, plagiare , which means “to kidnap.” The term has evolved over the years to now mean the act of taking another individual’s work and using it as your own, without acknowledging the original author (American Psychological Association, 2020 p. 21). Plagiarism can be illegal and there can be serious ramifications for plagiarizing someone else’s work. Thankfully, plagiarism can be prevented. One way it can be prevented is by including citations and references in your research project. Want to make them quickly and easily? Try the Citation Machine citation generator, which is found on our homepage.

All about citations & references

Citations and references should be included anytime you use another individual’s work in your own assignment. When including a quote, paraphrased information, images, or any other piece of information from another’s work, you need to show where you found it by including a citation and a reference. This guide explains how to make them.

APA style citations are added in the body of a research paper or project and references are added to the last page.

Citations , which are called in-text citations, are included when you’re adding information from another individual’s work into your own project. When you add text word-for-word from another source into your project, or take information from another source and place it in your own words and writing style (known as paraphrasing), you create an in-text citation. These citations are short in length and are placed in the main part of your project, directly after the borrowed information.

References are found at the end of your research project, usually on the last page. Included on this reference list page is the full information for any in-text citations found in the body of the project. These references are listed in alphabetical order by the author's last name.

An APA in-text citation includes only three items: the last name(s) of the author(s), the year the source was published, and sometimes the page or location of the information. References include more information such as the name of the author(s), the year the source was published, the full title of the source, and the URL or page range.

Why is it important to include citations & references

Including APA citations and references in your research projects is a very important component of the research process. When you include citations, you’re being a responsible researcher. You’re showing readers that you were able to find valuable, high-quality information from other sources, place them into your project where appropriate, all while acknowledging the original authors and their work.

Common ways students and scholars accidentally plagiarize

Believe it or not, there are instances when you could attempt to include in-text and full references in the appropriate places, but still accidentally plagiarize. Here are some common mistakes to be aware of:

Mistake #1 - Misquoting sources: If you plan to use a direct quote, make sure you copy it exactly as is. Sure, you can use part of the full quote or sentence, but if you decide to put quotation marks around any words, those words should match exactly what was found in the original source. Here’s a line from The Little Prince , by Antoine de Saint-Exupéry:

“Grown-ups never understand anything by themselves, and it is tiresome for children to be always and forever explaining things to them.”

Here’s an acceptable option:

“Grown-ups never understand anything by themselves,” stated de Saint-Exupéry (1943, p. 3).

Here’s a misquote:

“Grown-ups barely ever understand anything by themselves,” stated de Saint-Exupéry (1943, p. 3).

Notice the slight change in the words. The incorrect phrasing is an instance of accidental plagiarism.

Mistake #2 - Problems with paraphrasing: When we paraphrase, we restate information using our own words and writing style. It’s not acceptable to substitute words from the original source with synonyms.

Let’s use the same sentence from The Little Prince .

A correct paraphrase could be:

de Saint-Exupéry (1943) shares various ways adults frustrate children. One of the biggest being that kids have to explain everything. It’s too bad adults are unable to comprehend anything on their own (p. 3).

An incorrect paraphrase would be:

de Saint-Exupéry (1943) shares that adults never understand anything by themselves, and it is exhausting for kids to be always and forever clarifying things to them (p.3).

Notice how close the incorrect paraphrase is from the original. This is an instance of accidental plagiarism.

Make sure you quote and paraphrase properly in order to prevent accidental plagiarism.

If you’re having a difficult time paraphrasing properly, it is acceptable to paraphrase part of the text AND use a direct quote. Here’s an example:

de Saint-Exupery (1943) shares various ways adults frustrate children. One of the biggest being that kids have to explain everything, and “it is tiresome for children to be always and forever explaining things to them” (p. 3).

Information About APA

Who created it.

The American Psychological Association is an organization created for individuals in the psychology field. With close to 121,000 members, they provide educational opportunities, funding, guidance, and research information for everything psychology-related. They also have numerous high-quality databases, peer-reviewed journals, and books that revolve around mental health.

The American Psychological Association is also credited with creating their own specific citation and reference style. Today, this format is used by individuals not only in the psychology field, but many other subject areas as well. Education, economics, business, and social sciences also use APA style quite frequently. Click here for more information . This guide covers general information about the style, but is not affiliated with the American Psychological Association.

Why was this style created?

This format was first developed in 1929 to form a standardized way for researchers in science fields to document their sources. Prior to the inception of these standards and guidelines, individuals were recognizing the work of other authors by including bits and pieces of information in random order. There wasn’t a set way to format citations and references. You can probably imagine how difficult it was to understand the sources that were used for research projects!

Having a standard format for citing sources allows readers to glance at a citation or APA reference and easily locate the title, author, year published, and other critical pieces of information needed to understand a source.

The evolution of this style

The guide below is based on APA style 7th edition, which was released in 2020. In previous versions of APA format, researchers and scholars were required to include the publisher location for books and the date that an electronic resource was accessed. Both are no longer required to be included.

Details on the differences between the 6th and 7th editions is addressed later in this guide.

Citations & References

The appearance of citations & references.

The format for references varies, but most use this general format:

%%Author’s Last name, First initial. (Date published). Title . URL

Researchers and scholars must look up the proper format for the source that they’re attempting to cite. Books have a certain format, websites have a different format, periodicals have a different format, and so on. Scroll down to find the proper format for the source you’re citing or referencing.

If you would like help citing your sources, CitationMachine.com has a citation generator that will help make the APA citation process much easier for you. To start, simply click on the source type you're citing:

• Journal articles

In-text citations

An APA in-text citation is included in research projects in three instances: When using a direct quote, paraphrasing information, or simply referring to a piece of information from another source.

Quite often, researchers and scholars use a small amount of text, word for word, from another source and include it in their own research projects. This is done for many reasons. Sometimes, another author’s words are so eloquently written that there isn’t a better way to rephrase it yourself. Other times, the author’s words can help prove a point or establish an understanding for something in your research project. When using another author’s exact words in your research project, include an APA in-text citation directly following it.

In addition to using the exact words from another source and placing them into your project, these citations are also added anytime you paraphrase information. Paraphrasing is when you take information from another source and rephrase it, in your own words.

When simply referring to another piece of information from another source, also include a citation directly following it.

Citations in the text are found near a direct quote, paraphrased information, or next to a mention of another source. To see examples of some narrative/ parenthetical citations in action, look at the image above, under “All About Citations & References.”

Note: *Only include the page or paragraph number when using a direct quote or paraphrase. Page numbers have a p. before the number, pp. before the page range, and para. before the paragraph number. This information is included to help the reader locate the exact portion of text themselves. It is unnecessary to include this information when you’re simply referring to another source.

Examples of APA in-text citations:

“Well, you’re about to enter the land of the free and the brave. And I don’t know how you got that stamp on your passport. The priest must know someone” (Tóibín, 2009, p. 52).

Student teachers who use technology in their lessons tend to continue using technology tools throughout their teaching careers (Kent & Giles, 2017, p. 12).

If including the author’s name in the sentence, place the year in the parentheses directly next to his or her name. Add the page number at the end, unless it’s a source without any pages or paragraph numbers (See Section 8.10 of the Publication manual for more details).

In-text citation APA example:

According to a study done by Kent and Giles (2017), student teachers who use technology in their lessons tend to continue using technology tools throughout their teaching careers.

The full references, or citations, for these sources can be found on the last part of a research project, titled the “References.”

Here’s how to create in-text citations for specific amounts of authors:

APA citation with no author

When the source lacks an author’s name, place the title, year, and page number (if available) in the text. The title should be in italics if it sits alone (such as a movie, brochure, or report). If the source is part of a whole (as many web pages and articles are), place the title in quotation marks without italics (See Section 8.14 of the Publication manual ).

Structure of an APA format citation in the text narratively, with the author's name missing:

Title of Source (Year) or “Title of Source” (Year)

Structure of an APA style format citation, in parentheses at the end of the sentence, with the author’s name missing: (Title of Source, Year) or (“Title of Source,” Year)

Structure for one author

In the text, narratively: Last name of Author (Year)...(page number).

In parentheses, at the end of the sentence: (Last name of Author, Year, page number).

Structure for two authors

Place the authors in the order they appear on the source. Only use the ampersand in the parenthetical citations (see Section 8.17 of the Publication manual ). Use ‘and’ to separate the author names if they’re in the text of the sentence.

In the text, narratively: Last name of Author 1 and Last name of Author 2 (Year)....(page number).

In parentheses, at the end of the sentence: (Last name of Author 1 & Last name of Author 2, Year, page number).

Structure for three or more authors

Only include the first listed author’s name in the first and any subsequent citations. Follow it with et al.

(Last name Author 1 et al., Year, page number)

(Agbayani et al., 2020, p. 99)

Last name of Author 1 et al. (Year)...(page).

Agbayani et al. (2020)...(p. 99)

One author, multiple works, same year

What do you do when you want to cite multiple works by an author, and the sources all written in the same year?

Include the letters ‘a’ ‘b’ ‘c’ and so on after the year in the citation.

(Jackson, 2013a)

Jackson (2013a)

Writers can even lump dates together.

Example: Jackson often studied mammals while in Africa (2013a, 2013b).

On the APA reference page, include the same letters in the full references.

Groups and organizations

Write out the full name of the group or organization in the first citation and place the abbreviation next to it in brackets. If the group or organization is cited again, only include the abbreviation. If it doesn’t have an abbreviation associated with it, write out the entire organization’s name each and every time (see Section 8.21 of the Publication manual ).

First APA citation for an organization with an abbreviation: (World Health Organization [WHO], Year)

World Health Organization (WHO, Year)

Notice in the example directly above, the name of the organization is written out in full in the text of the sentence, and the abbreviation is placed in parentheses next to it.

Subsequent APA citations in the text for an organization with an abbreviation: (WHO, Year) OR WHO (Year)

All citations in the text for an organization without an abbreviation: (Citation Machine, Year) or Citation Machine (Year)

One in-text citation, multiple works

Sometimes you’ll need to cite more than one work within an in-text citation. Follow the same format (author, year) format but place semicolons between works (p. 263).

(Obama, 2016; Monroe et al., 1820; Hoover & Coolidge, 1928)

Reminder: There are many citation tools available on CitationMachine.com. Head to our homepage to learn more, check out our APA citation website, and cite your sources easily! The most useful resource on our website? Our APA citation generator, which doesn’t just create full references, it’s also an APA in-text citation website! It’ll do both for you!

Click here to learn more about crediting work .

Reference list citation components

References display the full information for all the citations found in the body of a research project.

Some things to keep in mind when it comes to the references:

• All references sit together on their own page, which is usually the last page(s) of a paper.
• Title the page ‘References’
• Place ‘References’ in the center of the page and bold it. Keep the title in the same font and size as the references. Do not italicize, underline, place the title in quotation marks, or increase the font size.
• The entire page is double spaced.
• All references are listed in alphabetical order by the first word in the reference, which is usually the author’s last name. If the source lacks an author, alphabetize the source by the title (ignore A, An, or The)
• All references have a hanging indent, meaning that the second line of text is indented in half an inch. See examples throughout this guide.
• Remember, each and every citation in the text of the paper MUST have a full reference displayed in the reference list. The citations in the text provide the reader with a quick glimpse about the sources used, but the references in the reference list provide the reader with all the information needed to seek out the source themselves.

Learn more about each component of the reference citation and how to format it in the sections that follow. See an APA sample paper reference list at the end of this entire section.

Author’s names

The names of authors are written in reverse order. Include the initials for the first and middle names. End this information with a period (see Section 9.8 of the Publication manual ).

Format: Last name, F. M.

• Angelou, M.
• Doyle, A. C.

Two or more authors

When two or more authors work together on a source, write them in the order in which they appear on the source. You can name up to 20 authors in the reference. For sources with 2 to 20 authors, place an ampersand (&) before the final author. Use this format:

Last name, F. M., & Last name, F. M.

Last name, F. M., Last name, F. M., Last name, F. M., Last name, F. M., & Last name, F. M.

Kent, A. G., Giles, R. M., Thorpe, A., Lukes, R., Bever, D. J., & He, Y.

If there are 21 or more authors listed on a source, only include the first 19 authors, add three ellipses, and then add the last author’s name.

Roberts, A., Johnson, M. C., Klein, J., Cheng, E. V., Sherman, A., Levin, K. K. , ...Lopez, G. S.

If you plan on using a free APA citation tool, like the one at CitationMachine.com, the names of the authors will format properly for you.

###No authors

If the source lacks an author, place the title in the first position in the reference (Section 9.12 of the Publication manual ). When the source’s title begins with a number (Such as 101 Dalmatians ), place the reference alphabetically as if the number was spelled out. 101 Dalmatians would be placed in the spot where ‘One hundred’ would go, but keep the numbers in their place.

Additionally, if the title begins with the words ‘A’, ‘An,’ or ‘The,’ ignore these words and place the title alphabetically according to the next word.

See the “Titles” section below for more information on formatting the title of sources.

###Corporate/Organization authors

On an APA reference page, corporate authors are always written out in full. In the text of your paper, you may have some abbreviations (such as UN for United Nations), but in the full references, always include the full names of the corporation or organization (following Section 9.11 of the official Publication manual ).

%%United Nations. (2019). Libya: $202 million needed to bring life-saving aid to half a million people hit by humanitarian crisis. https://news.un.org/en/story/2019/02/1031981

Publication date & retrieval date

Directly after the author’s name is the date the source was published. Include the full date for newspapers and magazine articles, and only the year for journals and all other sources. If no date is found on the source, include the initials, n.d. for “no date.”

%% Narducci, M. (2017, May 19). City renames part of 11th Street Ed Snider Way to honor Flyers founder. The Philadelphia Inquirer . http://www.philly.com/

If using our APA Citation Machine, our citation generator will add the correct format for you automatically.

Giving a retrieval date is not needed unless the online content is likely to be frequently updated and changed (e.g., encyclopedia article, dictionary entry, Twitter profile, etc.).

%%Citation Machine [@CiteMachine]. (n.d.). Tweets [Twitter profile]. Twitter. Retrieved October 10, 2019, from https://twitter.com/CiteMachine

When writing out titles for books, articles, chapters, or other non-periodical sources, only capitalize the first word of the title and the first word of the subtitle. Names of people, places, organizations, and other proper nouns also have the first letter capitalized. For books and reports, italicize the title in the APA citation.

Strange case of Dr. Jekyll and Mr. Hyde.

Roots: The saga of an American family.

For articles and chapters in APA referencing, do not italicize the title.

Wake up the nation: Public libraries, policy making, and political discourse.

For newspapers, magazines, journals, newsletters, and other periodicals, capitalize the first letter in each word and italicize the title.

The Seattle Times.

A common question is whether to underline your title or place it in italics or quotation marks in the reference list. Here’s a good general rule: When a source sits alone and is not part of a larger whole, place the title in italics. If the source does not sit alone and is part of a larger whole, do not place it in italics.

Books, movies, journals, and television shows are placed in italics since they stand alone. Songs on an album, episodes of television shows, chapters in books, and articles in journals are not placed in italics since they are smaller pieces of larger wholes.

The Citation Machine citation generator will format the title in your citations automatically.

Additional information about the title

If you feel it would be helpful to include additional information about the source type, include a descriptive noun or two in brackets immediately following the title. Capitalize the first letter.

%%Kennedy, K., & Molen, G. R. (Producers), & Spielberg, S. (Director). (1993). Jurassic Park [Film]. USA: Universal.

Besides [Film], other common notations include:

• [Audio podcast]
• [Letter to the editor]
• [Television series episode]
• [Facebook page]
• [Blog post]
• [Lecture notes]
• [PowerPoint presentation]
• [Video file]

If you are using Citation Machine citing tools, additional information about the title is automatically added for you.

Publisher information

For books and reports, include the publisher name but not the location (see Section 9.29 of the Publication manual ). Older editions of the style required the city, state and/or country, but this hasn't been the case since the 7th edition was released.

It is not necessary to include the entire name of the publisher. It is acceptable to use a brief, intelligible form. However, if Books or Press are part of the publisher’s names, keep these words in the reference. Other common terms, such as Inc., Co., Publishers, and others can be omitted.

For newspapers, journals, magazines, and other periodicals, include the volume and issue number after the title. The volume number is listed first, by itself, in italics. The issue number is in parentheses immediately after it, not italicized. There is no space after the closing parenthesis and before the volume number.

%%Giannoukos, G., Besas, G., Hictour, V., & Georgas, T. (2016). A study on the role of computers in adult education. Educational Research and Reviews , 11 (9), 907-923. https://doi.org/10.5897/ERR2016.2688

After including the publisher information, end this section with a period.

Perseus Books.

Electronic source information:

For online sources, the URL or DOI (Direct Object Identifier) are included at the end of an APA citation.

DOI numbers are often created by publishers for journal articles and other periodical sources. They were created in response to the problem of broken or outdated links and URLs. When a journal article is assigned a DOI number, it is static and will never change. Because of its permanent characteristic, DOIs are the preferred type of electronic information to include in APA citations. When a DOI number is not available, include the source’s URL (see Section 9.34 in the Publication manual ).

For DOIs, include the number in this format:

http://doi.org/xxxx

For URLs, type them in this format:

http:// or https://

Other information about electronic sources:

• If the URL is longer than a line, break it up before a punctuation mark.
• Do not place a period at the end of the citation/URL.
• It is unnecessary to include retrieval dates, unless the source changes often over time (like in a Wikipedia article).
• It is not necessary to include the names of databases

If using the Citation Machine APA citation website autocite features, the online publication information will be automatically replaced by the DOI. The Citation Machine APA template will properly cite your online sources for you.

Make sure you run your completed paper through the Citation Machine Plus smart proofreader, which scans for grammar, spelling, and plagiarism. Whether it’s an adjective , verb , or pronoun out-of-place, our technology helps edits your paper for you!

Annotated bibliographies:

An APA annotated bibliography is a full bibliography that includes a small note for each reference citation. Each note should be short (1-2 paragraphs) and contain a summary or your evaluation about each source. When creating your citations on CitationMachine.net, there is a field at the bottom of each form to add your own annotations.

Follow the publication manual guidelines on paper format and writing style. Let your instructor guide other details about your annotations. Still confused? Read our guide on annotated bibliographies .

These types of projects look different depending on the style you’re using. Use the link at the top of the page to access resources related to the Modern Language Association’s style. Here’s information related to Chicago citation style .

Page formatting

Need help with the design and formatting of your paper? Look no further! This section provides the ins and outs of properly displaying the information in your APA essay.

• Times New Roman, 12-point size.
• Calibri, Arial, or Georgia, 11-point size
• Lucida, Sans Unicode, or Computer Modern, 10-point size
• Indents = Every paragraph should start with an indent.
• Margins = 1 inch around the entire document
• Spacing = Double space everything!

Arrange your pages in this order:

• Page 1 - APA Title Page (see below for information on the title page)
• Page 2 - Abstract (If your professor requests one)
• Page 3 - First page of text
• References begin on their own page. Include the list of references on the page after the text.
• Tables and figures

Keep in mind that the order above is the recommendation for papers being submitted for peer review. If you’re writing an APA style paper for a class, your professor may be more lenient about the requirements. Also, if you’re submitting your paper for a specific journal, check the requirements on the journal’s website. Each journal has different rules and procedures.

Just a little nudge to remind you about the Citation Machine Plus smart proofreader. Whether it’s a conjunction or interjection out of place, a misspelled word, or an out of place citation, we’ll offer suggestions for improvement! Don’t forget to check out our APA citation maker while you’re at it!

Running heads

In older editions of APA, running heads were required for all papers. Since the 7th edition, that’s changed.

• Student paper: No running head
• Professional paper: Include a running head

The running head displays the title of the paper and the page number on all pages of the paper. This header is found on every page of a professional paper (not a student paper), even on the title page (sometimes called an APA cover page) and reference list (taken from Section 2.8 of the Publication manual ).

It's displayed all in capital letters at the top of the page. Across from the running head, along the right margin, is the page number.

• Use the header feature in your word processor. Both Google Docs and Word have these features available.
• Use one for the recommended fonts mentioned under "Page formatting."

Title pages

A title page, sometimes called an APA cover page, graces the cover of an essay or paper. An APA title page should follow rules from Section 2.3 of the official Publication manual and include:

• Page number, which is page 1
• Use title case and bold font
• The title should be under 12 words in length
• The title should be a direct explanation of the focus of the paper. Do not include any unnecessary descriptors such as “An Analysis of…” or “A Study of…”
• Exclude any labels such as Mr., Ms., Dr, PhD...
• Name of the school or institution
• Course number and/or class name
• Name of your instructor, including their preferred honorifics (e.g., PhD, Dr., etc.)
• Paper’s due date
• If this is a professional paper, also include a running head. If this is a student paper, do not include one.

Follow the directions for the running head and page number in the section above. Below the running head, a few lines beneath, and centered in the middle of the page, should be the title. The next line below is the author’s name(s), followed by the name of the school or institution, the class or course name, your instructor’s name, and the paper’s due date.

All components on this page should be written in the same font and size as the rest of your paper. Double space the title, names, name of school or institution, and all other information on the page (except for the running head and page number).

Example - Student Title Page APA:

Example - Professional Title Page APA:

If you’re submitting your paper to a journal for publication, check the journal’s website for exact requirements. Each journal is different and some may request a different type of APA format cover page.

Looking to create an APA format title page? Head to CitationMachine.com’s homepage and choose “Title Page” at the top of the screen.

An abstract briefly but thoroughly summarizes dissertation contents. It’s found in the beginning of a professional paper, right after the title page. Abstracts are meant to help readers determine whether to continue reading the entire document. With that in mind, try to craft the lead sentence to entice the reader to continue reading.

Here are a few tips:

• Be factual and keep your opinions out. An abstract should accurately reflect the paper or dissertation and should not involve information or commentary not in the thesis.
• Communicate your main thesis. What was the examined problem or hypothesis? A reader should know this from reading your abstract.
• Keep it brief. Stick to the main points and don’t add unnecessary words or facts. It should not exceed 250 words.
• Consider your paper’s purpose. It’s important to cater your abstract to your paper type and think about what information the target audience for that paper type would want. For example, an empirical article may mention methodology or participant description. A quantitative or qualitative meta-analysis would mention the different variables considered and how information was synthesized.
• Use verbs over noun equivalents, and active voice. Example: “There was research into…” becomes “We researched…”

Formatting guidelines:

• The abstract goes after the title page.
• It should have the same font (size and type) as the rest of the paper.
• It should stick to one page.
• Double-space all page text.
• Center and bold the word “Abstract” at the top of the paper.
• Don’t indent the first line of the abstract body. The body should also be in plain text.
• For the keywords, place it on the line after the abstract and indent the first line (but not subsequent lines). The word “Keywords:” is capitalized, italicized, and followed by a colon. The actual keywords are sentence case and in plan font.
• List each keyword one after the other, and separate them by a comma.
• After the last keyword, no ending punctuation is needed.

Tables & Figures

If your paper includes a lot of numerical information or data, you may want to consider placing it into a table or a figure, rather than typing it all out. A visual figure or simple, organized table filled with numerical data is often easier for readers to digest and comprehend than tons of paragraphs filled with numbers. Chapter 7 of the Publication manual outlines formatting for tables and figures. Let's cover the basics below.

If you’d like to include a table or figure in your paper, here are a few key pieces of information to keep in mind:

• At the end of the paper after the APA reference page
• In the text after it is first mentioned
• The table first mentioned in the text should be titled ‘Table 1.’ The next table mentioned in the text is ‘Table 2,’ and so on. For figures, it would be 'Figure 1,' 'Figure 2,' and so forth.

• Even though every table and figure is numbered, also create a title for each that describes the information it contains. Capitalize all important words in the title.
• For tables, do not use any vertical lines, only use horizontal to break up information and headings.
• Single spacing is acceptable to use in tables and figures. If you prefer double spacing your information, that is okay too.
• Do not include extra information or “fluff.” Keep it simple!
• Do not include the same exact information in the paper. Only include the complete information in one area—the table or the text.
• All tables and figures must be referenced in the text. It is unacceptable to throw a table or figure into the back of the paper without first providing a brief summary or explanation of its relevance.

Publication Manual 6th Edition vs 7th Edition

The 6th edition of the Publication Manual of the American Psychological Association was released in 2009. The current 7th edition came out in the fall of 2019 and was designed to be more student focused, provide more guidance on accessibility, and address changes that have developed over the last 10 years.

Below, we’ve listed what we feel are the most relevant changes related to APA format.

Journals and DOIs

DOI stands for “digital object identifier.” Many journal articles use and have a unique DOI that should be included in a full citation.

When including a DOI in a citation, format it as a URL. Do not label it “DOI.” Articles without DOIs from databases are treated as print works. For example:

6th edition:

%%Gänsicke, B. T., Schreiber, M. R., Toloza, O., Fusillo, N. P. G., Koester, D., & Manser, C. J. (2019). Accretion of a giant planet onto a white dwarf star. Nature, 576 (7785), 61–64. doi: 10.1038/s41586-019-1789-8

7th edition:

%%Gänsicke, B. T., Schreiber, M. R., Toloza, O., Fusillo, N. P. G., Koester, D., & Manser, C. J. (2019). Accretion of a giant planet onto a white dwarf star. Nature, 576 (7785), 61–64. https://doi.org/10.1038/s41586-019-1789-8

Citing Books

There are few new guidelines when you are citing a book. First, the publisher location no longer needs to be indicated.

%%Zack, P. O. (2001). The shoals of time. Bloomington, IN: First Books Library.

%%Zack, P. O. (2001). The shoals of time. First Books Library.

Second, the format of an ebook (e.g., Kindle, etc.) no longer needs to be indicated.

%%Niven, J. (2012). Ada Blackjack: A true story of survival in the Arctic [Kindle].

%%Niven, J. (2012). Ada Blackjack: A true story of survival in the Arctic .

Lastly, books from research databases without DOIs are treated the same as print works.

When using a URL in a citation, you no longer need to include the term “Retrieved from” before URLs (except with retrieval dates). The font should be blue and underlined, or black and not underlined.

6th Edition:

%%Flood, A. (2019, December 6). Britain has closed almost 800 libraries since 2010, figures show. The Guardian . Retrieved from https://www.theguardian.com/books/2019/dec/06/britain-has-closed-almost-800-libraries-since-2010-figures-show

7th Edition:

%%Flood, A. (2019, December 6). Britain has closed almost 800 libraries since 2010, figures show. The Guardian . https://www.theguardian.com/books/2019/dec/06/britain-has-closed-almost-800-libraries-since-2010-figures-show

Within a full APA citation, you may spell out up to 20 author names. For two to 20 authors, include an ampersand (&) before the name of the last author. For sources with 21 or more authors, structure it as follows:

Structure: First 19 authors’ names, . . . Last author’s name.

7th edition example: Washington, G., Adams, J., Jefferson, T., Madison, J., Monroe, J., Adams, J. Q., Jackson, A., Van Buren, M., Harrison, W. H., Tyler, J., Polk, J. K., Taylor, Z., Filmore, M., Pierce, F., Buchanan, J., Lincoln, A., Johnson, A., Grant, U. S., Hayes, R. B., Garfield, . . . Trump, D.

When creating an in-text citation for a source with 3 or more authors, use “et al.” after the first author’s name. This helps abbreviate the mention.

6th Edition: (Honda, Johnson, Prosser, Rossi, 2019)

7th Edition: (Honda et al., 2019)

Tables and Figures

Instead of having different formats for tables and figures, both use one standardized format. Now both tables and figures have a number, a title, name of the table/figure, and a note at the bottom.

If you’re still typing into Google “how to cite a website APA” among other related questions and keywords, click here for further reading on the style .

When you’re through with your writing, toss your entire paper into the Citation Machine Plus plagiarism checker , which will scan your paper for grammar edits and give you up to 5 suggestions cards for free! Worry less about a determiner , preposition , or adverb out of place and focus on your research!

American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.) (2020). American Psychological Association. https://doi.org/10.1037/0000165-000

Updated March 3, 2020

Written and edited by Michele Kirschenbaum and Wendy Ikemoto. Michele Kirschenbaum has been an awesome school librarian since 2006 and is an expert in citing sources. Wendy Ikemoto has a master’s degree in library and information science and has been working for Citation Machine since 2012.

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• Introduction
• Finding sources

Evaluating sources

• Integrating sources

Citing sources

Tools and resources, a quick guide to working with sources.

Working with sources is an important skill that you’ll need throughout your academic career.

It includes knowing how to find relevant sources, assessing their authority and credibility, and understanding how to integrate sources into your work with proper referencing.

This quick guide will help you get started!

Finding relevant sources

Sources commonly used in academic writing include academic journals, scholarly books, websites, newspapers, and encyclopedias. There are three main places to look for such sources:

• Research databases: Databases can be general or subject-specific. To get started, check out this list of databases by academic discipline . Another good starting point is Google Scholar .
• Your institution’s library: Use your library’s database to narrow down your search using keywords to find relevant articles, books, and newspapers matching your topic.
• Other online resources: Consult popular online sources like websites, blogs, or Wikipedia to find background information. Be sure to carefully evaluate the credibility of those online sources.

When using academic databases or search engines, you can use Boolean operators to refine your results.

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In academic writing, your sources should be credible, up to date, and relevant to your research topic. Useful approaches to evaluating sources include the CRAAP test and lateral reading.

CRAAP is an abbreviation that reminds you of a set of questions to ask yourself when evaluating information.

• Currency: Does the source reflect recent research?
• Relevance: Is the source related to your research topic?
• Authority: Is it a respected publication? Is the author an expert in their field?
• Accuracy: Does the source support its arguments and conclusions with evidence?
• Purpose: What is the author’s intention?

Lateral reading

Lateral reading means comparing your source to other sources. This allows you to:

• Verify evidence
• Contextualize information
• Find potential weaknesses

If a source is using methods or drawing conclusions that are incompatible with other research in its field, it may not be reliable.

Integrating sources into your work

Once you have found information that you want to include in your paper, signal phrases can help you to introduce it. Here are a few examples:

Following the signal phrase, you can choose to quote, paraphrase or summarize the source.

• Quoting : This means including the exact words of another source in your paper. The quoted text must be enclosed in quotation marks or (for longer quotes) presented as a block quote . Quote a source when the meaning is difficult to convey in different words or when you want to analyze the language itself.
• Paraphrasing : This means putting another person’s ideas into your own words. It allows you to integrate sources more smoothly into your text, maintaining a consistent voice. It also shows that you have understood the meaning of the source.
• Summarizing : This means giving an overview of the essential points of a source. Summaries should be much shorter than the original text. You should describe the key points in your own words and not quote from the original text.

Whenever you quote, paraphrase, or summarize a source, you must include a citation crediting the original author.

Citing your sources is important because it:

• Allows you to avoid plagiarism
• Establishes the credentials of your sources
• Backs up your arguments with evidence
• Allows your reader to verify the legitimacy of your conclusions

The most common citation styles are APA, MLA, and Chicago style. Each citation style has specific rules for formatting citations.

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Scribbr offers tons of tools and resources to make working with sources easier and faster. Take a look at our top picks:

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Peer Reviewed

GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation

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Academic journals, archives, and repositories are seeing an increasing number of questionable research papers clearly produced using generative AI. They are often created with widely available, general-purpose AI applications, most likely ChatGPT, and mimic scientific writing. Google Scholar easily locates and lists these questionable papers alongside reputable, quality-controlled research. Our analysis of a selection of questionable GPT-fabricated scientific papers found in Google Scholar shows that many are about applied, often controversial topics susceptible to disinformation: the environment, health, and computing. The resulting enhanced potential for malicious manipulation of society’s evidence base, particularly in politically divisive domains, is a growing concern.

Swedish School of Library and Information Science, University of Borås, Sweden

Department of Arts and Cultural Sciences, Lund University, Sweden

Division of Environmental Communication, Swedish University of Agricultural Sciences, Sweden

Research Questions

• Where are questionable publications produced with generative pre-trained transformers (GPTs) that can be found via Google Scholar published or deposited?
• What are the main characteristics of these publications in relation to predominant subject categories?
• How are these publications spread in the research infrastructure for scholarly communication?
• How is the role of the scholarly communication infrastructure challenged in maintaining public trust in science and evidence through inappropriate use of generative AI?

research note Summary

• A sample of scientific papers with signs of GPT-use found on Google Scholar was retrieved, downloaded, and analyzed using a combination of qualitative coding and descriptive statistics. All papers contained at least one of two common phrases returned by conversational agents that use large language models (LLM) like OpenAI’s ChatGPT. Google Search was then used to determine the extent to which copies of questionable, GPT-fabricated papers were available in various repositories, archives, citation databases, and social media platforms.
• Roughly two-thirds of the retrieved papers were found to have been produced, at least in part, through undisclosed, potentially deceptive use of GPT. The majority (57%) of these questionable papers dealt with policy-relevant subjects (i.e., environment, health, computing), susceptible to influence operations. Most were available in several copies on different domains (e.g., social media, archives, and repositories).
• Two main risks arise from the increasingly common use of GPT to (mass-)produce fake, scientific publications. First, the abundance of fabricated “studies” seeping into all areas of the research infrastructure threatens to overwhelm the scholarly communication system and jeopardize the integrity of the scientific record. A second risk lies in the increased possibility that convincingly scientific-looking content was in fact deceitfully created with AI tools and is also optimized to be retrieved by publicly available academic search engines, particularly Google Scholar. However small, this possibility and awareness of it risks undermining the basis for trust in scientific knowledge and poses serious societal risks.

Implications

The use of ChatGPT to generate text for academic papers has raised concerns about research integrity. Discussion of this phenomenon is ongoing in editorials, commentaries, opinion pieces, and on social media (Bom, 2023; Stokel-Walker, 2024; Thorp, 2023). There are now several lists of papers suspected of GPT misuse, and new papers are constantly being added. 1 See for example Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . While many legitimate uses of GPT for research and academic writing exist (Huang & Tan, 2023; Kitamura, 2023; Lund et al., 2023), its undeclared use—beyond proofreading—has potentially far-reaching implications for both science and society, but especially for their relationship. It, therefore, seems important to extend the discussion to one of the most accessible and well-known intermediaries between science, but also certain types of misinformation, and the public, namely Google Scholar, also in response to the legitimate concerns that the discussion of generative AI and misinformation needs to be more nuanced and empirically substantiated  (Simon et al., 2023).

Google Scholar, https://scholar.google.com , is an easy-to-use academic search engine. It is available for free, and its index is extensive (Gusenbauer & Haddaway, 2020). It is also often touted as a credible source for academic literature and even recommended in library guides, by media and information literacy initiatives, and fact checkers (Tripodi et al., 2023). However, Google Scholar lacks the transparency and adherence to standards that usually characterize citation databases. Instead, Google Scholar uses automated crawlers, like Google’s web search engine (Martín-Martín et al., 2021), and the inclusion criteria are based on primarily technical standards, allowing any individual author—with or without scientific affiliation—to upload papers to be indexed (Google Scholar Help, n.d.). It has been shown that Google Scholar is susceptible to manipulation through citation exploits (Antkare, 2020) and by providing access to fake scientific papers (Dadkhah et al., 2017). A large part of Google Scholar’s index consists of publications from established scientific journals or other forms of quality-controlled, scholarly literature. However, the index also contains a large amount of gray literature, including student papers, working papers, reports, preprint servers, and academic networking sites, as well as material from so-called “questionable” academic journals, including paper mills. The search interface does not offer the possibility to filter the results meaningfully by material type, publication status, or form of quality control, such as limiting the search to peer-reviewed material.

To understand the occurrence of ChatGPT (co-)authored work in Google Scholar’s index, we scraped it for publications, including one of two common ChatGPT responses (see Appendix A) that we encountered on social media and in media reports (DeGeurin, 2024). The results of our descriptive statistical analyses showed that around 62% did not declare the use of GPTs. Most of these GPT-fabricated papers were found in non-indexed journals and working papers, but some cases included research published in mainstream scientific journals and conference proceedings. 2 Indexed journals mean scholarly journals indexed by abstract and citation databases such as Scopus and Web of Science, where the indexation implies journals with high scientific quality. Non-indexed journals are journals that fall outside of this indexation. More than half (57%) of these GPT-fabricated papers concerned policy-relevant subject areas susceptible to influence operations. To avoid increasing the visibility of these publications, we abstained from referencing them in this research note. However, we have made the data available in the Harvard Dataverse repository.

The publications were related to three issue areas—health (14.5%), environment (19.5%) and computing (23%)—with key terms such “healthcare,” “COVID-19,” or “infection”for health-related papers, and “analysis,” “sustainable,” and “global” for environment-related papers. In several cases, the papers had titles that strung together general keywords and buzzwords, thus alluding to very broad and current research. These terms included “biology,” “telehealth,” “climate policy,” “diversity,” and “disrupting,” to name just a few.  While the study’s scope and design did not include a detailed analysis of which parts of the articles included fabricated text, our dataset did contain the surrounding sentences for each occurrence of the suspicious phrases that formed the basis for our search and subsequent selection. Based on that, we can say that the phrases occurred in most sections typically found in scientific publications, including the literature review, methods, conceptual and theoretical frameworks, background, motivation or societal relevance, and even discussion. This was confirmed during the joint coding, where we read and discussed all articles. It became clear that not just the text related to the telltale phrases was created by GPT, but that almost all articles in our sample of questionable articles likely contained traces of GPT-fabricated text everywhere.

Evidence hacking and backfiring effects

Generative pre-trained transformers (GPTs) can be used to produce texts that mimic scientific writing. These texts, when made available online—as we demonstrate—leak into the databases of academic search engines and other parts of the research infrastructure for scholarly communication. This development exacerbates problems that were already present with less sophisticated text generators (Antkare, 2020; Cabanac & Labbé, 2021). Yet, the public release of ChatGPT in 2022, together with the way Google Scholar works, has increased the likelihood of lay people (e.g., media, politicians, patients, students) coming across questionable (or even entirely GPT-fabricated) papers and other problematic research findings. Previous research has emphasized that the ability to determine the value and status of scientific publications for lay people is at stake when misleading articles are passed off as reputable (Haider & Åström, 2017) and that systematic literature reviews risk being compromised (Dadkhah et al., 2017). It has also been highlighted that Google Scholar, in particular, can be and has been exploited for manipulating the evidence base for politically charged issues and to fuel conspiracy narratives (Tripodi et al., 2023). Both concerns are likely to be magnified in the future, increasing the risk of what we suggest calling evidence hacking —the strategic and coordinated malicious manipulation of society’s evidence base.

The authority of quality-controlled research as evidence to support legislation, policy, politics, and other forms of decision-making is undermined by the presence of undeclared GPT-fabricated content in publications professing to be scientific. Due to the large number of archives, repositories, mirror sites, and shadow libraries to which they spread, there is a clear risk that GPT-fabricated, questionable papers will reach audiences even after a possible retraction. There are considerable technical difficulties involved in identifying and tracing computer-fabricated papers (Cabanac & Labbé, 2021; Dadkhah et al., 2023; Jones, 2024), not to mention preventing and curbing their spread and uptake.

However, as the rise of the so-called anti-vaxx movement during the COVID-19 pandemic and the ongoing obstruction and denial of climate change show, retracting erroneous publications often fuels conspiracies and increases the following of these movements rather than stopping them. To illustrate this mechanism, climate deniers frequently question established scientific consensus by pointing to other, supposedly scientific, studies that support their claims. Usually, these are poorly executed, not peer-reviewed, based on obsolete data, or even fraudulent (Dunlap & Brulle, 2020). A similar strategy is successful in the alternative epistemic world of the global anti-vaccination movement (Carrion, 2018) and the persistence of flawed and questionable publications in the scientific record already poses significant problems for health research, policy, and lawmakers, and thus for society as a whole (Littell et al., 2024). Considering that a person’s support for “doing your own research” is associated with increased mistrust in scientific institutions (Chinn & Hasell, 2023), it will be of utmost importance to anticipate and consider such backfiring effects already when designing a technical solution, when suggesting industry or legal regulation, and in the planning of educational measures.

Recommendations

Solutions should be based on simultaneous considerations of technical, educational, and regulatory approaches, as well as incentives, including social ones, across the entire research infrastructure. Paying attention to how these approaches and incentives relate to each other can help identify points and mechanisms for disruption. Recognizing fraudulent academic papers must happen alongside understanding how they reach their audiences and what reasons there might be for some of these papers successfully “sticking around.” A possible way to mitigate some of the risks associated with GPT-fabricated scholarly texts finding their way into academic search engine results would be to provide filtering options for facets such as indexed journals, gray literature, peer-review, and similar on the interface of publicly available academic search engines. Furthermore, evaluation tools for indexed journals 3 Such as LiU Journal CheckUp, https://ep.liu.se/JournalCheckup/default.aspx?lang=eng . could be integrated into the graphical user interfaces and the crawlers of these academic search engines. To enable accountability, it is important that the index (database) of such a search engine is populated according to criteria that are transparent, open to scrutiny, and appropriate to the workings of  science and other forms of academic research. Moreover, considering that Google Scholar has no real competitor, there is a strong case for establishing a freely accessible, non-specialized academic search engine that is not run for commercial reasons but for reasons of public interest. Such measures, together with educational initiatives aimed particularly at policymakers, science communicators, journalists, and other media workers, will be crucial to reducing the possibilities for and effects of malicious manipulation or evidence hacking. It is important not to present this as a technical problem that exists only because of AI text generators but to relate it to the wider concerns in which it is embedded. These range from a largely dysfunctional scholarly publishing system (Haider & Åström, 2017) and academia’s “publish or perish” paradigm to Google’s near-monopoly and ideological battles over the control of information and ultimately knowledge. Any intervention is likely to have systemic effects; these effects need to be considered and assessed in advance and, ideally, followed up on.

Our study focused on a selection of papers that were easily recognizable as fraudulent. We used this relatively small sample as a magnifying glass to examine, delineate, and understand a problem that goes beyond the scope of the sample itself, which however points towards larger concerns that require further investigation. The work of ongoing whistleblowing initiatives 4 Such as Academ-AI, https://www.academ-ai.info/ , and Retraction Watch, https://retractionwatch.com/papers-and-peer-reviews-with-evidence-of-chatgpt-writing/ . , recent media reports of journal closures (Subbaraman, 2024), or GPT-related changes in word use and writing style (Cabanac et al., 2021; Stokel-Walker, 2024) suggest that we only see the tip of the iceberg. There are already more sophisticated cases (Dadkhah et al., 2023) as well as cases involving fabricated images (Gu et al., 2022). Our analysis shows that questionable and potentially manipulative GPT-fabricated papers permeate the research infrastructure and are likely to become a widespread phenomenon. Our findings underline that the risk of fake scientific papers being used to maliciously manipulate evidence (see Dadkhah et al., 2017) must be taken seriously. Manipulation may involve undeclared automatic summaries of texts, inclusion in literature reviews, explicit scientific claims, or the concealment of errors in studies so that they are difficult to detect in peer review. However, the mere possibility of these things happening is a significant risk in its own right that can be strategically exploited and will have ramifications for trust in and perception of science. Society’s methods of evaluating sources and the foundations of media and information literacy are under threat and public trust in science is at risk of further erosion, with far-reaching consequences for society in dealing with information disorders. To address this multifaceted problem, we first need to understand why it exists and proliferates.

Finding 1: 139 GPT-fabricated, questionable papers were found and listed as regular results on the Google Scholar results page. Non-indexed journals dominate.

Most questionable papers we found were in non-indexed journals or were working papers, but we did also find some in established journals, publications, conferences, and repositories. We found a total of 139 papers with a suspected deceptive use of ChatGPT or similar LLM applications (see Table 1). Out of these, 19 were in indexed journals, 89 were in non-indexed journals, 19 were student papers found in university databases, and 12 were working papers (mostly in preprint databases). Table 1 divides these papers into categories. Health and environment papers made up around 34% (47) of the sample. Of these, 66% were present in non-indexed journals.

Finding 2: GPT-fabricated, questionable papers are disseminated online, permeating the research infrastructure for scholarly communication, often in multiple copies. Applied topics with practical implications dominate.

The 20 papers concerning health-related issues are distributed across 20 unique domains, accounting for 46 URLs. The 27 papers dealing with environmental issues can be found across 26 unique domains, accounting for 56 URLs.  Most of the identified papers exist in multiple copies and have already spread to several archives, repositories, and social media. It would be difficult, or impossible, to remove them from the scientific record.

As apparent from Table 2, GPT-fabricated, questionable papers are seeping into most parts of the online research infrastructure for scholarly communication. Platforms on which identified papers have appeared include ResearchGate, ORCiD, Journal of Population Therapeutics and Clinical Pharmacology (JPTCP), Easychair, Frontiers, the Institute of Electrical and Electronics Engineer (IEEE), and X/Twitter. Thus, even if they are retracted from their original source, it will prove very difficult to track, remove, or even just mark them up on other platforms. Moreover, unless regulated, Google Scholar will enable their continued and most likely unlabeled discoverability.

A word rain visualization (Centre for Digital Humanities Uppsala, 2023), which combines word prominences through TF-IDF 5 Term frequency–inverse document frequency , a method for measuring the significance of a word in a document compared to its frequency across all documents in a collection. scores with semantic similarity of the full texts of our sample of GPT-generated articles that fall into the “Environment” and “Health” categories, reflects the two categories in question. However, as can be seen in Figure 1, it also reveals overlap and sub-areas. The y-axis shows word prominences through word positions and font sizes, while the x-axis indicates semantic similarity. In addition to a certain amount of overlap, this reveals sub-areas, which are best described as two distinct events within the word rain. The event on the left bundles terms related to the development and management of health and healthcare with “challenges,” “impact,” and “potential of artificial intelligence”emerging as semantically related terms. Terms related to research infrastructures, environmental, epistemic, and technological concepts are arranged further down in the same event (e.g., “system,” “climate,” “understanding,” “knowledge,” “learning,” “education,” “sustainable”). A second distinct event further to the right bundles terms associated with fish farming and aquatic medicinal plants, highlighting the presence of an aquaculture cluster.  Here, the prominence of groups of terms such as “used,” “model,” “-based,” and “traditional” suggests the presence of applied research on these topics. The two events making up the word rain visualization, are linked by a less dominant but overlapping cluster of terms related to “energy” and “water.”

The bar chart of the terms in the paper subset (see Figure 2) complements the word rain visualization by depicting the most prominent terms in the full texts along the y-axis. Here, word prominences across health and environment papers are arranged descendingly, where values outside parentheses are TF-IDF values (relative frequencies) and values inside parentheses are raw term frequencies (absolute frequencies).

Finding 3: Google Scholar presents results from quality-controlled and non-controlled citation databases on the same interface, providing unfiltered access to GPT-fabricated questionable papers.

Google Scholar’s central position in the publicly accessible scholarly communication infrastructure, as well as its lack of standards, transparency, and accountability in terms of inclusion criteria, has potentially serious implications for public trust in science. This is likely to exacerbate the already-known potential to exploit Google Scholar for evidence hacking (Tripodi et al., 2023) and will have implications for any attempts to retract or remove fraudulent papers from their original publication venues. Any solution must consider the entirety of the research infrastructure for scholarly communication and the interplay of different actors, interests, and incentives.

We searched and scraped Google Scholar using the Python library Scholarly (Cholewiak et al., 2023) for papers that included specific phrases known to be common responses from ChatGPT and similar applications with the same underlying model (GPT3.5 or GPT4): “as of my last knowledge update” and/or “I don’t have access to real-time data” (see Appendix A). This facilitated the identification of papers that likely used generative AI to produce text, resulting in 227 retrieved papers. The papers’ bibliographic information was automatically added to a spreadsheet and downloaded into Zotero. 6 An open-source reference manager, https://zotero.org .

We employed multiple coding (Barbour, 2001) to classify the papers based on their content. First, we jointly assessed whether the paper was suspected of fraudulent use of ChatGPT (or similar) based on how the text was integrated into the papers and whether the paper was presented as original research output or the AI tool’s role was acknowledged. Second, in analyzing the content of the papers, we continued the multiple coding by classifying the fraudulent papers into four categories identified during an initial round of analysis—health, environment, computing, and others—and then determining which subjects were most affected by this issue (see Table 1). Out of the 227 retrieved papers, 88 papers were written with legitimate and/or declared use of GPTs (i.e., false positives, which were excluded from further analysis), and 139 papers were written with undeclared and/or fraudulent use (i.e., true positives, which were included in further analysis). The multiple coding was conducted jointly by all authors of the present article, who collaboratively coded and cross-checked each other’s interpretation of the data simultaneously in a shared spreadsheet file. This was done to single out coding discrepancies and settle coding disagreements, which in turn ensured methodological thoroughness and analytical consensus (see Barbour, 2001). Redoing the category coding later based on our established coding schedule, we achieved an intercoder reliability (Cohen’s kappa) of 0.806 after eradicating obvious differences.

The ranking algorithm of Google Scholar prioritizes highly cited and older publications (Martín-Martín et al., 2016). Therefore, the position of the articles on the search engine results pages was not particularly informative, considering the relatively small number of results in combination with the recency of the publications. Only the query “as of my last knowledge update” had more than two search engine result pages. On those, questionable articles with undeclared use of GPTs were evenly distributed across all result pages (min: 4, max: 9, mode: 8), with the proportion of undeclared use being slightly higher on average on later search result pages.

To understand how the papers making fraudulent use of generative AI were disseminated online, we programmatically searched for the paper titles (with exact string matching) in Google Search from our local IP address (see Appendix B) using the googlesearch – python library(Vikramaditya, 2020). We manually verified each search result to filter out false positives—results that were not related to the paper—and then compiled the most prominent URLs by field. This enabled the identification of other platforms through which the papers had been spread. We did not, however, investigate whether copies had spread into SciHub or other shadow libraries, or if they were referenced in Wikipedia.

We used descriptive statistics to count the prevalence of the number of GPT-fabricated papers across topics and venues and top domains by subject. The pandas software library for the Python programming language (The pandas development team, 2024) was used for this part of the analysis. Based on the multiple coding, paper occurrences were counted in relation to their categories, divided into indexed journals, non-indexed journals, student papers, and working papers. The schemes, subdomains, and subdirectories of the URL strings were filtered out while top-level domains and second-level domains were kept, which led to normalizing domain names. This, in turn, allowed the counting of domain frequencies in the environment and health categories. To distinguish word prominences and meanings in the environment and health-related GPT-fabricated questionable papers, a semantically-aware word cloud visualization was produced through the use of a word rain (Centre for Digital Humanities Uppsala, 2023) for full-text versions of the papers. Font size and y-axis positions indicate word prominences through TF-IDF scores for the environment and health papers (also visualized in a separate bar chart with raw term frequencies in parentheses), and words are positioned along the x-axis to reflect semantic similarity (Skeppstedt et al., 2024), with an English Word2vec skip gram model space (Fares et al., 2017). An English stop word list was used, along with a manually produced list including terms such as “https,” “volume,” or “years.”

• Artificial Intelligence
• / Search engines

Cite this Essay

Haider, J., Söderström, K. R., Ekström, B., & Rödl, M. (2024). GPT-fabricated scientific papers on Google Scholar: Key features, spread, and implications for preempting evidence manipulation. Harvard Kennedy School (HKS) Misinformation Review . https://doi.org/10.37016/mr-2020-156

• / Appendix B

Bibliography

Antkare, I. (2020). Ike Antkare, his publications, and those of his disciples. In M. Biagioli & A. Lippman (Eds.), Gaming the metrics (pp. 177–200). The MIT Press. https://doi.org/10.7551/mitpress/11087.003.0018

Barbour, R. S. (2001). Checklists for improving rigour in qualitative research: A case of the tail wagging the dog? BMJ , 322 (7294), 1115–1117. https://doi.org/10.1136/bmj.322.7294.1115

Bom, H.-S. H. (2023). Exploring the opportunities and challenges of ChatGPT in academic writing: A roundtable discussion. Nuclear Medicine and Molecular Imaging , 57 (4), 165–167. https://doi.org/10.1007/s13139-023-00809-2

Cabanac, G., & Labbé, C. (2021). Prevalence of nonsensical algorithmically generated papers in the scientific literature. Journal of the Association for Information Science and Technology , 72 (12), 1461–1476. https://doi.org/10.1002/asi.24495

Cabanac, G., Labbé, C., & Magazinov, A. (2021). Tortured phrases: A dubious writing style emerging in science. Evidence of critical issues affecting established journals . arXiv. https://doi.org/10.48550/arXiv.2107.06751

Carrion, M. L. (2018). “You need to do your research”: Vaccines, contestable science, and maternal epistemology. Public Understanding of Science , 27 (3), 310–324. https://doi.org/10.1177/0963662517728024

Centre for Digital Humanities Uppsala (2023). CDHUppsala/word-rain [Computer software]. https://github.com/CDHUppsala/word-rain

Chinn, S., & Hasell, A. (2023). Support for “doing your own research” is associated with COVID-19 misperceptions and scientific mistrust. Harvard Kennedy School (HSK) Misinformation Review, 4 (3). https://doi.org/10.37016/mr-2020-117

Cholewiak, S. A., Ipeirotis, P., Silva, V., & Kannawadi, A. (2023). SCHOLARLY: Simple access to Google Scholar authors and citation using Python (1.5.0) [Computer software]. https://doi.org/10.5281/zenodo.5764801

Dadkhah, M., Lagzian, M., & Borchardt, G. (2017). Questionable papers in citation databases as an issue for literature review. Journal of Cell Communication and Signaling , 11 (2), 181–185. https://doi.org/10.1007/s12079-016-0370-6

Dadkhah, M., Oermann, M. H., Hegedüs, M., Raman, R., & Dávid, L. D. (2023). Detection of fake papers in the era of artificial intelligence. Diagnosis , 10 (4), 390–397. https://doi.org/10.1515/dx-2023-0090

DeGeurin, M. (2024, March 19). AI-generated nonsense is leaking into scientific journals. Popular Science. https://www.popsci.com/technology/ai-generated-text-scientific-journals/

Dunlap, R. E., & Brulle, R. J. (2020). Sources and amplifiers of climate change denial. In D.C. Holmes & L. M. Richardson (Eds.), Research handbook on communicating climate change (pp. 49–61). Edward Elgar Publishing. https://doi.org/10.4337/9781789900408.00013

Fares, M., Kutuzov, A., Oepen, S., & Velldal, E. (2017). Word vectors, reuse, and replicability: Towards a community repository of large-text resources. In J. Tiedemann & N. Tahmasebi (Eds.), Proceedings of the 21st Nordic Conference on Computational Linguistics (pp. 271–276). Association for Computational Linguistics. https://aclanthology.org/W17-0237

Google Scholar Help. (n.d.). Inclusion guidelines for webmasters . https://scholar.google.com/intl/en/scholar/inclusion.html

Gu, J., Wang, X., Li, C., Zhao, J., Fu, W., Liang, G., & Qiu, J. (2022). AI-enabled image fraud in scientific publications. Patterns , 3 (7), 100511. https://doi.org/10.1016/j.patter.2022.100511

Gusenbauer, M., & Haddaway, N. R. (2020). Which academic search systems are suitable for systematic reviews or meta-analyses? Evaluating retrieval qualities of Google Scholar, PubMed, and 26 other resources. Research Synthesis Methods , 11 (2), 181–217.   https://doi.org/10.1002/jrsm.1378

Haider, J., & Åström, F. (2017). Dimensions of trust in scholarly communication: Problematizing peer review in the aftermath of John Bohannon’s “Sting” in science. Journal of the Association for Information Science and Technology , 68 (2), 450–467. https://doi.org/10.1002/asi.23669

Huang, J., & Tan, M. (2023). The role of ChatGPT in scientific communication: Writing better scientific review articles. American Journal of Cancer Research , 13 (4), 1148–1154. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10164801/

Jones, N. (2024). How journals are fighting back against a wave of questionable images. Nature , 626 (8000), 697–698. https://doi.org/10.1038/d41586-024-00372-6

Kitamura, F. C. (2023). ChatGPT is shaping the future of medical writing but still requires human judgment. Radiology , 307 (2), e230171. https://doi.org/10.1148/radiol.230171

Littell, J. H., Abel, K. M., Biggs, M. A., Blum, R. W., Foster, D. G., Haddad, L. B., Major, B., Munk-Olsen, T., Polis, C. B., Robinson, G. E., Rocca, C. H., Russo, N. F., Steinberg, J. R., Stewart, D. E., Stotland, N. L., Upadhyay, U. D., & Ditzhuijzen, J. van. (2024). Correcting the scientific record on abortion and mental health outcomes. BMJ , 384 , e076518. https://doi.org/10.1136/bmj-2023-076518

Lund, B. D., Wang, T., Mannuru, N. R., Nie, B., Shimray, S., & Wang, Z. (2023). ChatGPT and a new academic reality: Artificial Intelligence-written research papers and the ethics of the large language models in scholarly publishing. Journal of the Association for Information Science and Technology, 74 (5), 570–581. https://doi.org/10.1002/asi.24750

Martín-Martín, A., Orduna-Malea, E., Ayllón, J. M., & Delgado López-Cózar, E. (2016). Back to the past: On the shoulders of an academic search engine giant. Scientometrics , 107 , 1477–1487. https://doi.org/10.1007/s11192-016-1917-2

Martín-Martín, A., Thelwall, M., Orduna-Malea, E., & Delgado López-Cózar, E. (2021). Google Scholar, Microsoft Academic, Scopus, Dimensions, Web of Science, and OpenCitations’ COCI: A multidisciplinary comparison of coverage via citations. Scientometrics , 126 (1), 871–906. https://doi.org/10.1007/s11192-020-03690-4

Simon, F. M., Altay, S., & Mercier, H. (2023). Misinformation reloaded? Fears about the impact of generative AI on misinformation are overblown. Harvard Kennedy School (HKS) Misinformation Review, 4 (5). https://doi.org/10.37016/mr-2020-127

Skeppstedt, M., Ahltorp, M., Kucher, K., & Lindström, M. (2024). From word clouds to Word Rain: Revisiting the classic word cloud to visualize climate change texts. Information Visualization , 23 (3), 217–238. https://doi.org/10.1177/14738716241236188

Swedish Research Council. (2017). Good research practice. Vetenskapsrådet.

Stokel-Walker, C. (2024, May 1.). AI Chatbots Have Thoroughly Infiltrated Scientific Publishing . Scientific American. https://www.scientificamerican.com/article/chatbots-have-thoroughly-infiltrated-scientific-publishing/

Subbaraman, N. (2024, May 14). Flood of fake science forces multiple journal closures: Wiley to shutter 19 more journals, some tainted by fraud. The Wall Street Journal . https://www.wsj.com/science/academic-studies-research-paper-mills-journals-publishing-f5a3d4bc

The pandas development team. (2024). pandas-dev/pandas: Pandas (v2.2.2) [Computer software]. Zenodo. https://doi.org/10.5281/zenodo.10957263

Thorp, H. H. (2023). ChatGPT is fun, but not an author. Science , 379 (6630), 313–313. https://doi.org/10.1126/science.adg7879

Tripodi, F. B., Garcia, L. C., & Marwick, A. E. (2023). ‘Do your own research’: Affordance activation and disinformation spread. Information, Communication & Society , 27 (6), 1212–1228. https://doi.org/10.1080/1369118X.2023.2245869

Vikramaditya, N. (2020). Nv7-GitHub/googlesearch [Computer software]. https://github.com/Nv7-GitHub/googlesearch

This research has been supported by Mistra, the Swedish Foundation for Strategic Environmental Research, through the research program Mistra Environmental Communication (Haider, Ekström, Rödl) and the Marcus and Amalia Wallenberg Foundation [2020.0004] (Söderström).

Competing Interests

The authors declare no competing interests.

The research described in this article was carried out under Swedish legislation. According to the relevant EU and Swedish legislation (2003:460) on the ethical review of research involving humans (“Ethical Review Act”), the research reported on here is not subject to authorization by the Swedish Ethical Review Authority (“etikprövningsmyndigheten”) (SRC, 2017).

This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided that the original author and source are properly credited.

Data Availability

All data needed to replicate this study are available at the Harvard Dataverse: https://doi.org/10.7910/DVN/WUVD8X

Acknowledgements

The authors wish to thank two anonymous reviewers for their valuable comments on the article manuscript as well as the editorial group of Harvard Kennedy School (HKS) Misinformation Review for their thoughtful feedback and input.