APA (7th ed.) Citation

Mayer, M. (1987). There's an alligator under my bed. Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Mayer, Mercer. There's an Alligator Under My Bed. New York: Dial Books for Young Readers, 1987.

MLA (9th ed.) Citation

Mayer, Mercer. There's an Alligator Under My Bed. Dial Books for Young Readers, 1987.