Cita APA (7th ed.)

Jan Berenstain; Mike Berenstain. (2009). The Berenstain Bears' Class Trip (I Can Read Level 1). HarperCollins.

Cita Chicago (17th ed.)

Jan Berenstain; Mike Berenstain. The Berenstain Bears' Class Trip (I Can Read Level 1). HarperCollins, 2009.

Cita MLA (9th ed.)

Jan Berenstain; Mike Berenstain. The Berenstain Bears' Class Trip (I Can Read Level 1). HarperCollins, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.