Dyfyniad APA

Snook, J. (2008). Ice age extinction: Cause and human consequences. Algora Pub..

Dyfyniad Arddull Chicago

Snook, Jim. Ice Age Extinction: Cause and Human Consequences. New York: Algora Pub., 2008.

Dyfyniad MLA

Snook, Jim. Ice Age Extinction: Cause and Human Consequences. Algora Pub., 2008.

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