Does MLA style change for co-authored sources in graduate seminars?

Good news for you here: the core mechanics of citing two authors in MLA don't actually shift just because you've moved into grad school. The style itself stays put. So in your parenthetical citations, you'll still write (Smith and Jones 45) for two authors, and on your Works Cited page you'll still list it as "Smith, Aisha, and Marcus Jones." That part is exactly the same as what you did in undergrad. What does change at the master's level isn't the rulebook, it's how strictly your professor enforces the little things your undergraduate instructors may have let slide, like consistent use of the ampersand versus the word "and," correct italicization of the title, and making sure the period comes in the right spot inside the citation. In a seminar setting where advanced academic tone matters, tiny formatting slips read as carelessness, so the real upgrade is attention to detail rather than learning new citation logic. One more thing worth knowing: while two-author citations never change, three or more authors do shorten in MLA, you use only the first author's last name followed by "et al." in the parenthetical, which is something grad instructors tend to check closely. So don't stress about relearning a whole new system, just double-check every comma, period, and italics mark against the most current MLA handbook, and you'll meet the tone your seminar is asking for.