Dyfyniad APA

Sapolsky, R. M. (2004). Why zebras don't get ulcers (Third edition.). Times Books.

Dyfyniad Arddull Chicago

Sapolsky, Robert M. Why Zebras Don't Get Ulcers. Third edition. New York: Times Books, 2004.

Dyfyniad MLA

Sapolsky, Robert M. Why Zebras Don't Get Ulcers. Third edition. Times Books, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.