In-Text Citation Format Guide — APA, MLA, Chicago Side-by-Side

In-text citations differ across APA, MLA, and Chicago — different elements, different punctuation, different rules for direct quotes vs paraphrases. The citation generator handles the References/Works Cited/Bibliography; in-text is simple enough to write by hand once you know the rules. Here's the side-by-side guide.

Side-by-side: APA vs MLA vs Chicago

Case	APA 7	MLA 9	Chicago 17 (footnote)
Paraphrase, one author	(Smith, 2024)	(Smith 45)	1. John Smith, Title, 45.
Direct quote	(Smith, 2024, p. 45)	(Smith 45)	1. John Smith, Title, 45.
Two authors	(Smith & Lee, 2024)	(Smith and Lee 45)	1. Smith and Lee, Title, 45.
3+ authors	(Smith et al., 2024)	(Smith et al. 45)	1. Smith et al., Title, 45.
No author	("Article Title," 2024)	("Article Title")	1. "Article Title," Site, Date.
No date	(Smith, n.d.)	(Smith)	(varies)
Multiple sources	(Smith, 2024; Lee, 2023)	(Smith 45; Lee 12)	Separate footnotes

Key takeaways:

• APA cares about year. Always.
• MLA cares about page. No year in-text.
• Chicago uses footnotes with full citation first, shortened after.

APA 7 in-text citation rules

Paraphrase: (Author, Year). Example: Sleep deprivation reduces test scores (Smith, 2024).

Direct quote: (Author, Year, p. X). Example: "Test scores dropped 15%" (Smith, 2024, p. 18).

Quote from a web page (no page number): Use paragraph number or section heading. Example: (Smith, 2024, para. 5) or (Smith, 2024, "Methods section").

Narrative citation (author name in sentence): Smith (2024) argues that sleep deprivation... or Smith (2024, p. 18) wrote, "..."

Three or more authors: Always (Author et al., Year) — no more "Smith, Jones, & Brown, 2024" on first mention (APA 6 habit).

No author: ("Title," Year) — shortened title in quotes (for articles) or italicized (for standalone works).

No date: (Author, n.d.) — "n.d." stands for "no date."

MLA 9 in-text citation rules

MLA 9 in-text uses author + page number. No year.

Paraphrase or quote: (Author page). Example: Sleep deprivation reduces test scores (Smith 18).

Multiple pages: (Author pp–pp). Example: (Smith 18–20).

Narrative citation: Smith argues that sleep deprivation... (18). Or: Smith claims, "..." (18).

Two authors: (Smith and Lee 45). "and" spelled out, not "&".

3+ authors: (Smith et al. 45).

No author: (Shortened title in quotation marks or italics). Example: ("Climate Change" 45) for an article; (Climate Change 45) for a book.

Multiple works by same author: (Smith, Title 45) — include shortened title to disambiguate.

Websites without page numbers: (Smith) — just the author. No page, no section.

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Chicago 17 footnote citation rules

Chicago 17 (notes-bibliography) uses footnotes, not parenthetical citations. Every in-text reference gets a superscript number linked to a footnote.

First mention: Full footnote with all citation elements.

Example: John Smith noted that sleep deprivation affects performance.¹

Footnote: 1. John Smith, Research Methods in Education (New York: Oxford University Press, 2024), 45.

Subsequent mentions: Shortened form.

Example: Smith also showed variations across grade levels.²

Footnote: 2. Smith, Research Methods, 52.

Consecutive footnotes from same source: "Ibid." (same as above) — "Ibid., 53." for same source different page.

Multiple authors: First note lists all; subsequent notes use "et al." for 4+.

In Word / Google Docs: Insert → Footnote places a superscript number and cursor in the footnote area automatically. Don't type the superscript yourself.

Common mistakes across styles

• Forgetting the page number for direct quotes (APA). APA 7 requires p. X for direct quotes. Paraphrases don't need page numbers.
• Including year in MLA in-text. MLA doesn't use year in-text. If you see (Smith 2024), that's APA habit creeping in.
• "Et al." on first mention in APA 6 style. APA 7 changed this. Use "et al." from the first citation for 3+ authors.
• No comma between author and year in APA. APA uses (Smith, 2024) — comma required.
• Missing period after "et al." "Et al." is an abbreviation of "et alii" — the period is required.
• Using "Ibid." in APA or MLA. That's Chicago footnote style. APA and MLA just repeat the author.
• Citing the URL in-text. In-text citations use author and year (or page), not the URL. URL belongs in the References list.
• Putting the year before the author in APA in-text. It's (Author, Year), not (Year, Author).

Citing multiple sources at once

APA 7: Separate with semicolons, list alphabetically. (Jones, 2023; Smith, 2024; Taylor, 2022).

MLA 9: Separate with semicolons. (Smith 45; Lee 12).

Chicago 17: Use separate footnote numbers for each source, OR combine into one footnote separated by semicolons. 1. John Smith, Title One, 45; Sarah Lee, Title Two, 12.

For APA and MLA, this is common when one sentence is supported by multiple sources. For Chicago, it's usually clearer to use separate footnotes unless the sources support a single claim identically.

Frequently Asked Questions

Do I need to cite every sentence from a source, or just once per paragraph?

Rule of thumb: cite the first time you introduce the source in a paragraph. If you continue discussing the same source through multiple sentences, you don't need to cite each one — as long as it's clear the discussion continues. When in doubt, err on the side of citing more.

What counts as a "direct quote" vs a "paraphrase"?

Direct quote: using the source's exact words. Goes in quotation marks. Paraphrase: restating the source's idea in your own words. No quotation marks. APA requires page numbers for direct quotes; MLA requires page numbers for both.

How do I cite "Anonymous" as an author?

APA 7: only if "Anonymous" is the literal credited author. Then treat as a named author: (Anonymous, 2024). Don't use "Anonymous" just because no author is listed — in that case, use the title instead.

Can I use footnotes in APA or MLA?

APA allows footnotes for substantive comments (extra information, tangential context), but not for citations — citations in APA are always in-text parenthetical. MLA works similarly. Chicago is the main style that uses footnotes for citations.