APA (7th ed.) Citation

Mayer, M. (1968). There's a nightmare in my closet. Puffin Books.

Chicago Style (17th ed.) Citation

Mayer, Mercer. There's a Nightmare in My Closet. London: Puffin Books, 1968.

MLA (9th ed.) Citation

Mayer, Mercer. There's a Nightmare in My Closet. Puffin Books, 1968.