APA (7th ed.) Citation

Klein, S., & Aylesworth, T. (1983). The encyclopedia of North American wildlife. Facts on File.

Chicago Style (17th ed.) Citation

Klein, Stanley, and Tom Aylesworth. The Encyclopedia of North American Wildlife. New York, NY: Facts on File, 1983.

MLA (9th ed.) Citation

Klein, Stanley, and Tom Aylesworth. The Encyclopedia of North American Wildlife. Facts on File, 1983.