Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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