APA (7th ed.) Citation

Horsfall & Petrocino. (2006). Kid's kookiest knock-knocks. Sterling Publishing.

Chicago Style (17th ed.) Citation

Horsfall and Petrocino. Kid's Kookiest Knock-knocks. New York: Sterling Publishing, 2006.

MLA (8th ed.) Citation

Horsfall and Petrocino. Kid's Kookiest Knock-knocks. Sterling Publishing, 2006.

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