APA (7th ed.) Citation

Moore, A., Bolland, B., & Higgins, J. (1988). Batman: The killing joke. DC Comics.

Chicago Style (17th ed.) Citation

Moore, Alan, Brian Bolland, and John Higgins. Batman: The Killing Joke. New York, NY: DC Comics, 1988.

MLA (9th ed.) Citation

Moore, Alan, et al. Batman: The Killing Joke. DC Comics, 1988.