Dyfyniad APA

Berenstain, S., Berenstain, J., & Berenstain, M. (2008). The Berenstain Bears' big bedtime book. HarperCollins.

Dyfyniad Arddull Chicago

Berenstain, Stan, Jan Berenstain, and Mike Berenstain. The Berenstain Bears' Big Bedtime Book. New York: HarperCollins, 2008.

Dyfyniad MLA

Berenstain, Stan, et al. The Berenstain Bears' Big Bedtime Book. HarperCollins, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.