APA (7th ed.) Citation

Willems, M. (2009). Pigs make me sneeze!: An elephant & piggie book. Hyperion Books for Children.

Chicago Style (17th ed.) Citation

Willems, Mo. Pigs Make Me Sneeze!: An Elephant & Piggie Book. New York: Hyperion Books for Children, 2009.

MLA (8th ed.) Citation

Willems, Mo. Pigs Make Me Sneeze!: An Elephant & Piggie Book. Hyperion Books for Children, 2009.

Warning: These citations may not always be 100% accurate.