APA 7th Guidelines Reading time: 5 min

APA 7th Edition In-Text Citation Rules: When to Use "et al."

💡 APA 7 Author-Count Quick Reference Table

Author Count Parenthetical In-Text Narrative In-Text
1 Author (Adams, 2024) Adams (2024)
2 Authors (Adams & Baker, 2024) Adams and Baker (2024)
3 or More Authors (Adams et al., 2024) Adams et al. (2024)

Key Rule: In APA 7th edition, any work with 3+ authors uses 'et al.' on the very first mention.

1. The Critical Difference Between APA 6 and APA 7

The transition from APA 6th to APA 7th edition simplified in-text citations dramatically. In APA 6, authors were burdened with a confusing rule:

APA 7 eliminated this rule entirely. Today, for any work with 3 or more authors, you truncate immediately to the first author's surname followed by et al. from the very first sentence. This saves page space and prevents awkward in-text paragraphs.

2. Typography and Punctuation of 'et al.'

The Latin phrase et al. stands for et alii ("and others"). Pay close attention to these three non-negotiable punctuation rules:

  1. No Italics: Write et al. in regular font. Never italicize it in APA 7.
  2. Period After 'al.' Only: "Et" is a complete word; "al." is an abbreviation. Never write et. al. or et al without a period.
  3. Comma Placement:
    • Parenthetical: (Taylor et al., 2024) → Comma after the period.
    • Narrative: Taylor et al. (2024) observed that... → No comma after 'et al.' before the year.

3. The Disambiguation Exception (Same First Author & Year)

What happens when you cite two different papers published in the same year that share the same first author and would otherwise abbreviate to the exact same citation? For example:

Shortening both to (Taylor et al., 2023) would create an ambiguous citation where readers cannot tell which study is being cited.

APA 7 Solution: List as many authors as necessary to distinguish the two references, and then add et al.:

Citation for Study 1: (Taylor, Martinez, Wilson, et al., 2023)

Citation for Study 2: (Taylor, Martinez, Evans, et al., 2023)

4. Reference List Rules: How Many Authors to Include?

While the in-text citation is aggressively shortened, the References list at the end of your manuscript has a much higher threshold:

Author Count in Reference APA 7 Formatting Rule
1 to 20 Authors List all authors by surname and initials. Include an ampersand (&) before the final author.
21 or More Authors List the first 19 authors, insert an ellipsis (...) without an ampersand, and add the final author's name.

Example with 21+ Authors:

Wiskunde, T. W., Verstappen, P. A., Chen, J., Hamilton, L., Leclerc, C., Norris, L., Russell, G., Piastri, O., Alonso, F., Stroll, L., Gasly, P., Ocon, E., Albon, A., Colapinto, F., Tsunoda, Y., Lawson, L., Bottas, V., Zhou, G., Magnussen, K., . . . Hulkenberg, N. (2024). Aerodynamic ground effect modeling in engineering. Journal of Fluid Mechanics, 980, Article A12. https://doi.org/10.1017/jfm.2024.123

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