APA (7th ed.) Citation

Paul, R. W., & Etulain, R. W. (1977). The frontier and the American West. AHM Pub. Corp..

Chicago Style (17th ed.) Citation

Paul, Rodman W., and Richard W. Etulain. The Frontier and the American West. Arlington Heights, Ill.: AHM Pub. Corp., 1977.

MLA (9th ed.) Citation

Paul, Rodman W., and Richard W. Etulain. The Frontier and the American West. AHM Pub. Corp., 1977.