How to Cite Multiple Sources in One Citation

Quick Answer: How to Cite Multiple Sources in One Citation

Write each work the way you would write it alone, then join the works with semicolons inside one set of parentheses or one note. APA 7 orders the group alphabetically and collapses identical author strings to one name plus years. MLA 9 keeps author plus page for every work and lets you pick the order, as long as you keep that logic through the paper. Chicago 18 attaches one superscript to the sentence and lists the sources in that note; author-date uses the same semicolon join with a space, not a comma, between name and year. The reference list, works-cited list, or bibliography still carries one entry per work.

Three rules that hold in every style

A grouped citation is still a citation. These three constraints are why the parentheses or the note can be resolved against the list at the end.

1. Every work in the group must have its own entry in the list at the end. The parenthetical or note points at those entries. It does not replace them.
2. Semicolons separate works; commas belong inside a work. (Adams et al., 2019; Westinghouse, 2017) is two works. (Adams et al., 2019, Westinghouse, 2017) reads as one broken citation and is wrong in APA, MLA, and Chicago.
3. Each work keeps its normal in-text form. Grouping does not let you drop et al., a year, a page, or a required short title. Whatever the work needs alone, it needs inside the group.

The worked examples below are official demonstration strings or official style-center samples, not invented articles. APA §8.12 uses Adams, Shumway and Shulman, Westinghouse, the Department of Veterans Affairs, Zhou, and Sampson and Hughes. MLA uses Barthes and Foucault, then Alan Liu and Lauren Klein. Chicago uses the live Quick Guide pair Charles Yu and Amy J. Binder and Jeffrey L. Kidder.

APA 7 §8.12: alphabetical order, semicolons, shared authors collapsed

APA is the strictest of the three about order. Section 8.12 of the Publication Manual of the American Psychological Association (7th ed.), mirrored on the citing multiple works page and reprinted by the TCS Education System APA 7 guide, says to place parenthetical citations in alphabetical order, separated by semicolons. Alphabetical means the order the works take in the reference list, so Adams et al. files under A, Shumway & Shulman under S, and Westinghouse under W.

The names in that official string are Publication Manual demonstration citations. Do not invent a DOI or a journal title to go with them. What the group must still have, once you cite real papers of your own, is one reference-list entry per work. The 3 March 2026 Common Reference Examples Guide shows the current journal form:

Same author, several years: name once, years in order

When two or more works share exactly the same authors, APA writes the surname once and follows it with the years, separated by commas, in chronological order. Undated works come first as n.d., dated works follow in order, and in-press works come last. Two works from the same year take the lowercase letters they already carry in the reference list. Different author strings stay separate: Zhou alone and Zhou with a coauthor are two citations, not one collapsed year list. Letters themselves are the same-author, same-year workflow; this page only shows how those years sit inside a group.

Emphasising one work: put it first, then "see also"

Alphabetical order cannot show that one work matters more than the others. APA's answer is to cite the most relevant work first, then insert a semicolon and a phrase such as see also before the remaining works, which return to alphabetical order. The phrase is ordinary text inside the parentheses, not a citation element, so it is lowercase. The same mechanism allows an introductory e.g., when the list is a sample rather than a complete survey.

Narrative citations can take any order

The alphabetical rule applies only inside parentheses. When the authors are part of your sentence, APA lets them appear in whatever order the sentence needs. Use and instead of the ampersand, and put the year in parentheses straight after each name, as on the parenthetical versus narrative page.

When et al. would make two works identical

A grouped citation exposes a collision you might miss with a single work. If two papers both shorten to Kapoor et al., 2017, the parenthetical (Kapoor et al., 2017; Kapoor et al., 2017) tells the reader nothing. APA's same-year, same-first-author rule writes as many surnames as it takes to tell the works apart, then et al. for the rest. Year letters (2017a, 2017b) mark identical author lists, not different coauthor teams. The full cutoff lives on how to cite multiple authors.

MLA 9: semicolons, author plus page, your order

MLA has no alphabetical requirement. The MLA Style Center on the order of sources (1 September 2021) says the order in a single parenthetical is the writer's choice: alphabetic, by importance, or by date. Pick one logic and keep it for the whole paper. Every work still carries its author and, where the source is paginated, its page number, exactly as in the MLA in-text overview and MLA Handbook 9th ed. §§6.3–6.30.

The first official sentence puts Foucault first because he matters more to that discussion. The second puts Barthes first because the writer chose the alphabet. Both are correct. Switching from importance in one paragraph to the alphabet in the next looks like a mistake even though each order is allowed.

Two works by the same author need their titles

MLA identifies a work by author and page, so when the works-cited list holds two entries by the same author, the name alone is ambiguous and a shortened title becomes mandatory (MLA Handbook 9th ed. §6.8). The MLA Style Center quiz on citing multiple sources in a sentence uses Alan Liu's two PMLA essays and Lauren Klein's essay in the same special issue. Put a comma after the author, then the short title in quotation marks for an article (or italics for a book), then the page. Repeat the author's name with each title. MLA does not collapse years the way APA does, because MLA citations carry no year.

(Liu 130; Klein 23) is correct only when Liu has one works-cited entry. The moment the list also holds "The Meaning of Digital Humanities," the same parenthetical must become (Liu, "Toward a Diversity Stack" 130; Klein 23).

Long strings of sources belong in a bibliographic note

A parenthetical with five or six works interrupts the sentence more than it helps. The MLA Style Center on notes still states the ninth-edition practice: bibliographic notes are for citing several sources or making an evaluative comment on them. Put a superscript number in the text and move the list into a footnote or endnote. The works-cited entries do not change.

Chicago 18: one note for several sources, semicolons in author-date

Chicago has two systems, and grouping works differently in each. In notes-bibliography style, a single note can cite as many sources as the sentence needs, each in its full or shortened form, separated by semicolons. In author-date style the parenthetical looks like APA's but the order is not fixed alphabetically. Both systems are set out in the live Notes and Bibliography and Author-Date citation guides. The CMOS Q&A on multiple sources in one sentence restates §§13.31 and 13.61.

Notes-bibliography: several sources in one note

Attach one note number to the sentence, not one per source. Inside the note, give each source in the form it would take on its own and separate the sources with semicolons. Order them to match the order in which the text raises the points they support; when a single claim rests on all of them equally, order by importance or chronology. If an earlier note has already cited a work in full, use its shortened form inside the grouped note. Chicago 18 no longer asks for a place of publication, so the parentheses hold only the publisher and year. A CMOS Q&A adds that an and before the last source is optional; treat the note as a sentence and be consistent.

Two details are easy to get wrong. A journal note ends its page reference with a colon after the year, so the semicolon that follows the DOI or page number is the only thing separating the works; do not add a full stop until the last source. And a note that lists several works by the same author repeats the shortened author name with each title, because a Chicago note has no APA-style collapsed year list.

Author-date: semicolons, importance or chronology

Chicago author-date separates works with semicolons and gives each one author, year, and page. The order may follow the order of the points in the text, relative importance, chronology, or the alphabet; the live Author-Date Quick Guide does not insist on one. Works by the same author collapse as in APA, with the name written once and the years separated by commas, and same-year works take a and b. Remember that Chicago author-date puts a space, not a comma, between author and year, and that Chicago 18 shortens three or more authors to the first name plus et al. in the text, even though the reference list names up to six (Snyder is the live seven-author case).

Order rules side by side

Common mistakes

• Separating works with commas. (Adams et al., 2019, Westinghouse, 2017) is unreadable in every style; the semicolon is the whole mechanism.
• Listing APA works in the order you happened to read them. Alphabetise them, then use see also if one work has to come first.
• Repeating the surname in APA for works by identical authors. Write (Zhou, n.d., 2000, 2016, in press), not four separate Zhou citations.
• Collapsing different author strings. Zhou alone and Zhou with a coauthor are two works, and each keeps its own year.
• Adding 2017a and 2017b to a Kapoor et al. pair. Year letters mark identical author lists. Different coauthors stay different names.
• Dropping short titles in MLA when an author has two works in the list. (Liu 130; Klein 23) cannot be resolved once both Liu essays are cited.
• Switching MLA ordering logic between paragraphs. Alphabetical in one sentence and by importance in the next looks like an error even when each is allowed.
• Hanging a separate note number on every source in a Chicago sentence. One note, several sources, one number.
• Putting a full stop between sources in a Chicago note. Only the last source ends with a period.
• Writing (Yu, 2020, 45; Binder and Kidder, 2022) in Chicago author-date. Chicago uses a space between author and year, not a comma.
• Citing works in a group that are missing from the reference list, works-cited list, or bibliography. Every work in the parentheses needs an entry.
• Inventing a journal or DOI for Adams, Shumway, or Westinghouse. Those names are Publication Manual demonstration citations, not articles to reconstruct.

Related guides and official manuals

• How to Cite Multiple Authors in APA, MLA, and Chicago
• How to Cite the Same Source Multiple Times
• Same Author, Same Year: APA, MLA, and Chicago
• How to Cite a Source with No Date
• Referencing vs Citing
• APA in-text citations
• MLA in-text citations
• Chicago in-text citations and notes
• APA Style: citing multiple works
• APA Style: same year, same first author
• APA 7 Common Reference Examples Guide (3 March 2026)
• MLA Style Center: order of sources in a citation
• MLA Style Center: citing multiple sources in a sentence
• MLA Style Center: notes
• Chicago Q&A: one note, several sources
• Chicago Notes-Bibliography citation guide
• Chicago Author-Date citation guide