Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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