Cita APA (7a ed.)

Sadler, M., & Bollen, R. (1983). It's not easy being a bunny. Beginner Books.

Cita Chicago Style (17a ed.)

Sadler, Marilyn, y Roger Bollen. It's Not Easy Being a Bunny. New York: Beginner Books, 1983.

Cita MLA (8a ed.)

Sadler, Marilyn, y Roger Bollen. It's Not Easy Being a Bunny. Beginner Books, 1983.