What Does “et al.” Mean?

APA 7

For in-text citations with three or more authors, APA 7 generally uses the first author's surname followed by “et al.” from the first citation, for example: (Garcia et al., 2026). Reference-list rules are different: APA normally lists up to 20 authors before using an ellipsis and final author, so do not copy the in-text “et al.” rule into the reference list.

MLA 9

MLA commonly uses the first author followed by “et al.” when a source has three or more authors in both in-text and Works Cited contexts, depending on the source entry pattern.

Chicago

Chicago rules depend on whether you are using notes-bibliography or author-date and on the number of authors. Always check the required edition and local instructions rather than assuming APA rules apply.

Common mistakes

• Writing “et. al”
• Writing “et al” with no period after al
• Automatically italicizing et al. in modern citation styles
• Using et al. where the style requires authors to be listed
• Using it in the reference list simply because it appears in the in-text citation

How “et al.” works in academic citations

Et al. is an abbreviation of Latin wording meaning “and others.” In academic writing it shortens a citation when a work has multiple authors. The exact point at which it is used depends on the citation style, so follow the style guide required by the assignment rather than applying one universal rule.

In APA 7, works with three or more authors are normally cited in text using the first author's surname followed by “et al.” from the first citation. The reference list still gives the author information according to APA's reference-list rules. Other styles, including Harvard variants, Chicago and Vancouver, can treat multi-author citations differently.

Common mistakes

• Do not write “et. al.” with a period after et; the conventional form is “et al.”
• Do not use it as a replacement for the full reference-list entry unless the required style says so.
• Do not assume every Harvard guide uses exactly the same author threshold.
• Keep the treatment consistent throughout the document.

Examples in running text and parentheses

A narrative APA-style citation might read “Khan et al. (2025) found ...” while a parenthetical citation may appear as “(Khan et al., 2025).” The punctuation changes with the sentence, but et al. remains part of the author element. If two sources would shorten to the same author-year form, check the style guide for the disambiguation rule.

Use a structured quality check before finalising the draft

Read the work in separate passes rather than trying to fix everything at once. First check whether the document answers the question and whether each section has a clear purpose. On a second pass, check the evidence: every important claim should be supported, interpreted and connected to the argument. Only then move to sentence-level editing, references and formatting.

Questions for the final review

• Can the main answer or purpose be identified from the introduction?
• Does each paragraph make one clear contribution to that purpose?
• Are sources used as evidence rather than as a sequence of summaries?
• Are counterarguments, limitations or alternative interpretations considered where relevant?
• Do citations, references, headings and formatting match the required style?

Apply the principle to a real paragraph or section

Take one paragraph from the draft and identify its claim, evidence and explanation. If one of those elements is missing, the paragraph will usually feel incomplete. If the paragraph contains several unrelated claims, divide it or decide which claim actually matters for the question.

Next, compare the paragraph with the marking criteria. A rubric that rewards critical analysis normally expects more than accurate description. Add comparison, evaluation, interpretation, application or a justified limitation where the evidence allows it. This makes revision responsive to the assessment rather than cosmetic.

Why the rule changes between citation styles

Citation systems are designed differently. APA uses author-date citations and has its own rule for shortening multi-author works. MLA, Chicago author-date and institution-specific Harvard guides may use different thresholds or punctuation. This is why copying an “et al.” example from another style can introduce an error even when the source itself is correct.

Before submitting

• Identify the exact citation style and edition.
• Check whether your institution publishes a local Harvard guide.
• Search the document for inconsistent forms such as “et. al.” or different author thresholds.
• Make sure the full reference-list entry follows the same style.

The direct definition

Et al. is an abbreviation of the Latin phrase et alii, et aliae or et alia, meaning “and others.” In academic citations, it shortens a multi-author reference in text. It does not normally replace authors in the full reference-list entry unless the citation style's separate reference rule says so.

Write et al. with a full stop after al. because it is abbreviated. Do not put a full stop after et, and do not italicize the phrase in ordinary modern citation use unless a specific guide instructs otherwise.

Rules can change by edition and source type. Use the assigned official manual rather than memorizing one universal threshold.

APA 7 examples

Narrative: Rivera et al. (2024) report a change in revision behaviour. Parenthetical: Revision behaviour changed during the pilot (Rivera et al., 2024). Quotation form: A direct quotation adds a page, paragraph or other locator required by the assigned style: (Rivera et al., 2024, p. 18).

APA 7 generally uses et al. for works with three or more authors from the first in-text citation. If two different works would shorten to the same form, include enough surnames to distinguish them before et al. Follow the manual's ambiguity rule.

The reference list normally includes up to the number of authors specified by APA's reference-entry rule; et al. is not simply copied into every full entry.

MLA 9 examples

For a work with three or more authors, MLA commonly lists the first author followed by et al. in the in-text citation and Works Cited author position according to the handbook's rule:

Narrative: Rivera et al. identify the same pattern. Parenthetical: The pattern appears across both samples (Rivera et al. 18).

MLA typically omits a comma between author and page. Do not import APA punctuation into MLA.

Chicago examples

Chicago offers author–date and notes–bibliography systems. The threshold and formatting differ from APA and can vary between in-text citation, note and bibliography. For author–date, a common pattern is (Rivera et al. 2024, 18). Notes include publication or shortened-title information under their own rules.

Confirm the current Chicago Manual and the assignment. Do not mix author–date parentheses with full notes unless a hybrid is explicitly required.

Grammar in a sentence

Treat “Rivera et al.” as a plural author group:

• Rivera et al. argue that the sample should be expanded.
• The study by Rivera et al. reports a limitation.

In the first sentence, the authors are the subject; in the second, “study” is the singular subject.

Punctuation and possessives

The full stop belongs after al. Additional punctuation follows as the sentence requires:

• Rivera et al. (2024) ...
• (Rivera et al., 2024)
• Rivera et al.'s analysis ...

Possessive use can look awkward. Rephrase as “the analysis by Rivera et al.” when clarity improves.

Common mistakes

Wrong: et. al. — Correct: et al. Wrong: et al — Correct: et al. Wrong: Rivera, et al. — usually Correct: Rivera et al. Wrong: italicizing automatically — usually use roman type. Wrong: applying the APA threshold to MLA or Chicago. Wrong: using et al. for editors, organizations or titles without checking the style. Wrong: replacing the full reference entry automatically.

Why styles shorten differently

Citation systems balance brevity, author recognition and source identification. APA's author–date system emphasizes year; MLA often emphasizes author and textual location; Chicago supports two documentation systems. The resulting thresholds and punctuation are design choices, not grammar laws.

Ambiguous author groups

Suppose two 2024 works begin with Rivera and have different coauthors. Shortening both to Rivera et al. (2024) may make them indistinguishable. The style may require additional surnames or letter suffixes. Resolve the ambiguity in both in-text citation and reference list according to the manual.

Reference-manager checks

A reference manager can apply a style but depends on accurate metadata and style files. Verify author order, work type, date and output. Do not type “et al.” into an author field; enter each author separately so the software can apply the correct rule.

Final et al. checklist

• Required style and edition confirmed.
• Number of authors meets that style's threshold.
• First author's surname matches the full entry.
• Full stop appears after al. only.
• Narrative verb agrees with the actual subject.
• Locator and year punctuation match the style.
• Ambiguous groups are distinguished.
• Full reference contains the author treatment required by that style.

Use in-text citation styles for a wider comparison and APA style for APA student papers. Editing support can audit consistency while the writer verifies every source.

Et al. in a sentence versus a source entry

The shortened in-text form and the full-list rule are separate. APA can display Rivera et al. in the sentence while listing many authors in the reference. MLA may use et al. in the Works Cited author position for three or more authors. Chicago's note and bibliography each follow their own current thresholds. Always check both locations.

Corporate authors

An organization is not a multi-author group to shorten automatically with et al. Cite the corporate name under the style's organization rules. APA may allow a well-known abbreviation after it is introduced; MLA and Chicago handle organization names according to their own systems.

Editors, translators and group credits

Do not assume an editor list is cited like an author list. The person's role and the part used determine the entry. A translated book, chapter in an edited collection and film with several creators require source-type rules beyond et al. Use the official example for that source.

Spoken use and pronunciation

In a presentation, “and others” is often clearer to listeners than saying the Latin abbreviation repeatedly, though either may be understood. On a slide, use the citation format required and provide a complete reference in the handout or reference section. Pronunciation preferences do not change punctuation.

Database exports

Never replace omitted authors in a database record with the literal text et al. before importing to a reference manager. Retrieve the complete metadata when the style requires it. Missing authors can affect disambiguation, attribution and systematic-review records.

Final answer

Et al. means “and others” and shortens a multi-author citation under style-specific rules. Put the full stop after al., keep the first listed author accurate, and verify the assigned manual's author threshold, ambiguity rule and full-reference treatment.

Editing shortcut

Search the final draft for “et.”, “et al” and every multi-author citation. This quickly finds the common punctuation error, missing full stop and inconsistent shortening. Then compare each result with the full reference and assigned style.

When in doubt, write out the authors in your notes, identify the source type and consult the current manual. Guessing from appearance is how styles become mixed.

The safe rule is simple: identify the style first, then shorten the authors exactly as that style requires.

Always verify both the in-text citation and full source entry.

Authoritative sources for verification

• APA Style: Paper Format
• MLA Style Center: In-Text Citations
• Chicago/Turabian Citation Guide

These sources support the article's research and verification process. The current assignment, institution and official product documentation remain controlling where rules or features vary.

Frequently asked questions