APA (7th ed.) Citation

Sapolisky, R. M. (2004). Why zebras don't get ulcers (Third edition.). An owl book.

Chicago Style (17th ed.) Citation

Sapolisky, Robert M. Why Zebras Don't Get Ulcers. Third edition. New York: An owl book, 2004.

MLA (9th ed.) Citation

Sapolisky, Robert M. Why Zebras Don't Get Ulcers. Third edition. An owl book, 2004.

Warning: These citations may not always be 100% accurate.