APA (7th ed.) Citation

Bahn, P. G., & Vertut, J. (1988). Image of the ice age. Facts On File.

Chicago Style (17th ed.) Citation

Bahn, Paul G., and Jean Vertut. Image of the Ice Age. N.York: Facts On File, 1988.

MLA (9th ed.) Citation

Bahn, Paul G., and Jean Vertut. Image of the Ice Age. Facts On File, 1988.