APA (7th ed.) Citation

Willems, M. (2013). A big guy took my ball! Hyperion Books for Children.

Chicago Style (17th ed.) Citation

Willems, Mo. A Big Guy Took My Ball! New York: Hyperion Books for Children, 2013.

MLA (9th ed.) Citation

Willems, Mo. A Big Guy Took My Ball! Hyperion Books for Children, 2013.