APA (7th ed.) Citation

Weeks, S., & Berry, H. (2005). I'm a pig. Laura Geringer Books.

Chicago Style (17th ed.) Citation

Weeks, Sarah, and Holly Berry. I'm a Pig. New York: Laura Geringer Books, 2005.

MLA (8th ed.) Citation

Weeks, Sarah, and Holly Berry. I'm a Pig. Laura Geringer Books, 2005.

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