For MLA help with citing a comic book, head to this website: Comic Art in Scholarly Writing: A Citation Guide for different examples of citations based on what kind of comic you're looking to cite.
APA does not give a specific format for citing a comic book, but it is suggested to follow the same guidelines you would use for citing a magazine or journal article for a serialized comic (such as Batman, issue 12). You would then follow the book guidelines for a non-serialized comic (such as Maus by Art Spiegelman).
