APA način citiranja (7. izdanje)

Willems, M. (2011). Happy Pig Day! Hyperion Books for Children.

Čikaški stil citiranja (17. izdanje)

Willems, Mo. Happy Pig Day! New York: Hyperion Books for Children, 2011.

MLA način citiranja (8. izdanje)

Willems, Mo. Happy Pig Day! Hyperion Books for Children, 2011.