APA (7th ed.) Citation

Rafferty, J. P. (2011). The paleozoic era: Diversification of plant and animal life. Britannica Educational Publishing.

Chicago Style (17th ed.) Citation

Rafferty, John P. The Paleozoic Era: Diversification of Plant and Animal Life. New York: Britannica Educational Publishing, 2011.

MLA (9th ed.) Citation

Rafferty, John P. The Paleozoic Era: Diversification of Plant and Animal Life. Britannica Educational Publishing, 2011.