APA (7th ed.) Citation

Carpenter, A., Provorse, C., & Lyon, R. (1991). The encyclopedia of the Far West. Facts on File.

Chicago Style (17th ed.) Citation

Carpenter, Allan, Carl Provorse, and Randy Lyon. The Encyclopedia of the Far West. New York: Facts on File, 1991.

MLA (9th ed.) Citation

Carpenter, Allan, et al. The Encyclopedia of the Far West. Facts on File, 1991.