APA (7th ed.) Citation

Hodgman, A., & Pierard, J. (1991). My babysitter is a vampire. Pocket Books.

Chicago Style (17th ed.) Citation

Hodgman, Ann, and John Pierard. My Babysitter Is a Vampire. New York: Pocket Books, 1991.

MLA (9th ed.) Citation

Hodgman, Ann, and John Pierard. My Babysitter Is a Vampire. Pocket Books, 1991.