APA (7th ed.) Citation

Ubbelohde, C., Benson, M., & Smith, D. A. (1972). A Colorado history (3d ed.). Pruett Pub. Co..

Chicago Style (17th ed.) Citation

Ubbelohde, Carl, Maxine Benson, and Duane A. Smith. A Colorado History. 3d ed. Boulder, Colo.: Pruett Pub. Co., 1972.

MLA (9th ed.) Citation

Ubbelohde, Carl, et al. A Colorado History. 3d ed. Pruett Pub. Co., 1972.