APA (7th ed.) Citation

Sutton, A., & Sutton, M. (1974). Wilderness areas of North America. Funk & Wagnalls.

Chicago Style (17th ed.) Citation

Sutton, Ann, and Myron Sutton. Wilderness Areas of North America. New York: Funk & Wagnalls, 1974.

MLA (9th ed.) Citation

Sutton, Ann, and Myron Sutton. Wilderness Areas of North America. Funk & Wagnalls, 1974.