The source you are documenting may be part of a sequence, like a numbered volume, issue, episode, or season. Numbered sequences may include a volume in a multi-volume set, a journal issue, comic books, episodes of television series, etc.
Ex. Rampersad, Arnold. The Life of Langston Hughes. 2nd ed., vol. 2, Oxford UP, 2002.
Ex. Young, Vershawn Ashanti. “Should Writers Use They Own English?” Iowa Journal of Cultural Studies, vol. 12, no. 1, 2010, pp. 110–18.
Ex. Clowes, Daniel. David Boring. Eightball, no. 19, Fantagraphics, 1998.
Ex. “Hush.” Buffy the Vampire Slayer, created by Joss Whedon, season 4, episode 10, Mutant Enemy, 1999.
From MLA Handbook, 9th ed., Ch. 5.51 Number: What It Is
