Et Al. Explained: How to Use It Correctly in Academic Writing
Academic manuscripts often teem with abbreviated Latin phrases, yet none causes more quiet confusion than the unassuming “et al.”
This tiny tag appears in nearly every reference list and in-text citation, but its correct deployment hinges on nuanced style rules that vary across disciplines.
Origin and Literal Meaning
Etymology
The abbreviation stems from the Latin “et alii,” literally “and others.”
Understanding the phrase’s literal sense helps writers avoid the common mistake of treating it as a synonym for “multiple authors” in every context.
Its roots remind us that “others” must always be people, never inanimate entities or concepts.
Historical Usage
Medieval manuscripts first shortened collaborative references to save costly parchment space.
Scribes used “& al.” long before the modern “et al.” gained typographic stability.
Today’s standardized form reflects centuries of editorial refinement rather than a single authoritative decree.
Style Manual Variations
APA 7th Edition
APA allows “et al.” only after the first citation of works with three or more authors.
For sources with exactly two authors, always list both surnames joined by an ampersand.
A study by Carter, Liu, and Patel (2022) becomes Carter et al. (2022) on second mention.
MLA 9th Edition
MLA permits “et al.” for any source with four or more contributors.
Unlike APA, MLA uses the phrase in both parenthetical and narrative citations from the outset.
Example: (Rodriguez et al. 87) or Rodriguez et al. argue that …
Chicago 17th Edition
Chicago prefers full author lists in notes and bibliography entries unless the list exceeds ten names.
When truncating, Chicago spells out “and others” in notes but keeps “et al.” in the bibliography.
This duality prevents reader confusion between footnote brevity and catalogue completeness.
IEEE
IEEE employs “et al.” only in the reference list when author counts exceed six.
In-text citations use bracketed numbers, eliminating the phrase entirely from the body text.
A journal article by Kim, Singh, Brown, Lee, Nguyen, and Garcia appears as “Kim et al.” in the references.
Common Missteps
Wrong Punctuation
Placing a comma after “et al.” violates every major style guide.
Correct: Singh et al. (2023) discovered… Incorrect: Singh, et al., (2023) discovered…
The period after “al” already functions as the abbreviation’s terminal punctuation.
Plural Mismatch
“Et al.” always refers to multiple people, so singular verbs create grammatical dissonance.
Say “Lee et al. challenge,” not “Lee et al. challenges.”
Remember the Latin plural “alii” embedded in the abbreviation.
Overuse in Prose
Inserting “et al.” into narrative sentences where full names would clarify authorship breeds opacity.
Use it in citations, but write “Smith and colleagues” or “the research team” when discussing findings in flowing text.
This keeps prose readable while preserving citation economy.
In-Text Citation Scenarios
First vs Subsequent Mentions
APA’s rule hinges on citation sequence, not page location.
If a paragraph cites a work for the first time, list all authors regardless of prior mentions in earlier sections.
Track each source’s debut with reference management software to automate compliance.
Multiple Works by Same Lead Author
When Chen et al. (2021) and Chen et al. (2023) appear together, disambiguate with shortened titles: Chen et al. (“Climate Models,” 2021) vs Chen et al. (“Urban Heat,” 2023).
Never rely solely on publication years when lead authors match.
Style guides prioritize reader clarity over writer convenience.
Group Authors
Institutional authorship complicates abbreviation logic.
The World Health Organization never becomes WHO et al., because “Organization” is singular and not an additional author.
Spell out group names on every mention unless the group itself adopts an acronym as its formal author designation.
Reference List Implications
Truncation Limits
Most journals cap author lists at three, six, or ten names before invoking “et al.”
Check each journal’s author guidelines; Science truncates after three, while Nature Medicine allows ten.
Exceeding a journal’s limit without abbreviation triggers automatic desk rejection.
Alphabetization Nuances
Reference entries shortened with “et al.” sort under the first listed surname.
Thus, “Anderson et al.” precedes “Anderson & Baker” even though the latter has fewer authors.
Indexing software relies on this rule, so manual overrides risk misfiled citations.
Non-English Scholarly Traditions
French Usage
French journals often prefer “et collaborateurs” over “et al.” to sidestep Latin opacity.
When submitting to journals like Comptes Rendus, replace “et al.” with “et coll.” if required.
Failure to localize can mark a manuscript as Anglo-centric.
German Norms
German style guides such as DIN 1505-2 prescribe “u. a.” (und andere) rather than “et al.”
The abbreviation “u. a.” is set without italics and followed by a comma, unlike its Latin counterpart.
Adapting ensures seamless integration into German-language bibliographies.
Chinese Databases
CNKI and similar repositories sometimes omit “et al.” in favour of a numeric superscript indicating additional authors.
When exporting references for international journals, manually reinstate “et al.” according to target guidelines.
Automated translators frequently miss this cultural switch, so double-check exported metadata.
Digital Citation Tools
Zotero Settings
In Zotero’s CSL editor, locate the “et-al-min” and “et-al-use-first” parameters to control truncation thresholds.
Setting “et-al-min” to 4 enforces MLA style, whereas 3 aligns with APA.
Save custom styles under a memorable filename to prevent overwrites during updates.
EndNote Tweaks
EndNote’s “Author Lists” tab allows separate configurations for footnotes and bibliographies.
Activate “If more than 3 authors, list the first 1 and abbreviate with” to mirror APA rules.
Sync settings across devices to maintain consistency on mobile and desktop platforms.
Mendeley Pitfalls
Mendeley defaults to Chicago’s ten-author threshold, which may conflict with APA submissions.
Override the default by editing the style in the Mendeley CSL editor before final submission.
Always export a test citation to verify that changes propagate correctly.
Collaborative Authoring Challenges
Version Control
When co-authors edit via Google Docs, citation plugins can revert “et al.” to full lists during real-time collaboration.
Freeze citation formatting by unlinking fields before sharing the final draft.
This prevents accidental re-expansion during last-minute edits.
Consent and Attribution
All listed authors must consent to truncation; junior contributors may view abbreviation as erasure.
Establish author-order and abbreviation policies early in the drafting process.
A brief authorship statement in the cover letter clarifies intentional abbreviation to editors.
Edge Cases
Dual First Authors
Some journals designate co-first authorship with asterisks or footnotes.
In such cases, “Smith† et al.” preserves the dual-lead recognition while still abbreviating remaining contributors.
Verify journal preference for dagger symbols versus typographic notes.
Posthumous Publications
When a deceased researcher appears first, ethical norms discourage abbreviation out of respect.
List the full team once, then use “et al.” only if the deceased author would have approved.
Consult the corresponding author and the deceased’s institution for guidance.
Retracted Papers
Citing retracted works requires full author disclosure to ensure accountability.
Even if the original reference used “et al.,” restore complete authorship when referencing the retraction notice.
This transparency helps readers trace responsibility across corrections.
Accessibility Considerations
Screen Reader Compatibility
Screen readers pronounce “et al.” as “et al” unless explicitly coded with pronunciation hints.
Add ARIA labels such as “and others” in HTML supplements or alt-text for inclusive dissemination.
This minor tweak aligns with WCAG 2.1 guidelines for scholarly content.
Braille Transcription
Braille contractions render “et al.” as a single-cell symbol unfamiliar to novice readers.
Provide a transcriber’s note on first use to maintain clarity for braille audiences.
Consult the Braille Authority’s guidelines for scientific notation.
Future Trajectories
ORCID Integration
Emerging proposals suggest replacing “et al.” with expandable ORCID lists in digital PDFs.
Clicking “et al.” would reveal a pop-up roster of hyperlinked author profiles.
Such systems balance brevity with full attribution in screen-based reading.
AI-Generated Authorship
If AI tools earn co-authorship status, “et al.” may evolve into “et AI.” or similar constructs.
Current style councils debate whether non-human contributors warrant abbreviation at all.
Until consensus emerges, spell out AI involvement explicitly to preclude ambiguity.
Practical Workflow Checklist
Pre-Submission Audit
Scan the manuscript for every “et al.” and cross-check against journal guidelines.
Ensure punctuation, verb agreement, and truncation limits match exactly.
Run a final reference export to verify no hidden metadata overrides your formatting choices.
Peer Review Readiness
Provide a supplementary author contribution statement clarifying why abbreviation was applied.
Attach a formatted citation appendix showing full author lists alongside abbreviated forms.
This transparency accelerates editorial checks and reduces reviewer queries.