Sapolisky, R. M. (2004). Why zebras don't get ulcers (Third edition.). An owl book.
Lua i Stíl Chicago (17ú heag.)Sapolisky, Robert M. Why Zebras Don't Get Ulcers. Third edition. New York: An owl book, 2004.
Lua MLA (9ú heag.)Sapolisky, Robert M. Why Zebras Don't Get Ulcers. Third edition. An owl book, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.