Cita APA (7a ed.)

McCall, E. S., & Faulkner, J. (1954). The Buttons at the zoo. Beckley-Cardy.

Cita Chicago Style (17a ed.)

McCall, Edith S., y Jack Faulkner. The Buttons at the Zoo. Chicago: Beckley-Cardy, 1954.

Cita MLA (8a ed.)

McCall, Edith S., y Jack Faulkner. The Buttons at the Zoo. Beckley-Cardy, 1954.