Cita APA (7a ed.)

Sapolsky, R. M., & Berkrot, P. (2012). Why zebras don't get ulcers (Unabridged.). Tantor Media.

Cita Chicago Style (17a ed.)

Sapolsky, Robert M., y Peter Berkrot. Why Zebras Don't Get Ulcers. Unabridged. Old Saybrook: Tantor Media, 2012.

Cita MLA (8a ed.)

Sapolsky, Robert M., y Peter Berkrot. Why Zebras Don't Get Ulcers. Unabridged. Tantor Media, 2012.

Precaución: Estas citas no son 100% exactas.