APA (7th ed.) Citation

Willems, M. (2012). The duckling gets a cookie!? Hyperion Books for Children.

Chicago Style (17th ed.) Citation

Willems, Mo. The Duckling Gets a Cookie!? New York, NY: Hyperion Books for Children, 2012.

MLA (9th ed.) Citation

Willems, Mo. The Duckling Gets a Cookie!? Hyperion Books for Children, 2012.

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