APA (7th ed.) Citation

Berenstain, J., & Berenstain, M. (2009). The Berenstain Bears' class trip. HarperCollins.

Chicago Style (17th ed.) Citation

Berenstain, Jan, and Mike Berenstain. The Berenstain Bears' Class Trip. New York, NY: HarperCollins, 2009.

MLA (8th ed.) Citation

Berenstain, Jan, and Mike Berenstain. The Berenstain Bears' Class Trip. HarperCollins, 2009.

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