APA (7th ed.) Citation

Willems, M. (2011). I broke my trunk! Hyperion Books for Children.

Chicago Style (17th ed.) Citation

Willems, Mo. I Broke My Trunk! New York: Hyperion Books for Children, 2011.

MLA (9th ed.) Citation

Willems, Mo. I Broke My Trunk! Hyperion Books for Children, 2011.