Pomeroy, E. S., & Etulain, R. W. (2008). The American Far West in the twentieth century. Yale University Press.

Pomeroy, Earl S., and Richard W. Etulain. The American Far West in the Twentieth Century. New Haven: Yale University Press, 2008.

Pomeroy, Earl S., and Richard W. Etulain. The American Far West in the Twentieth Century. Yale University Press, 2008.