APA (7th ed.) Citation

Sutton, A., Sutton, M., & Adams, A. (1969). The American West: A natural history. Classic Publications.

Chicago Style (17th ed.) Citation

Sutton, Ann, Myron Sutton, and Ansel Adams. The American West: A Natural History. Covina, Calif.: Classic Publications, 1969.

MLA (9th ed.) Citation

Sutton, Ann, et al. The American West: A Natural History. Classic Publications, 1969.