APA (7th ed.) Citation

University of New Mexico. Center for the American West & Etulain, R. W. (1994). The American West in the twentieth century: A bibliography. University of Oklahoma Press.

Chicago Style (17th ed.) Citation

University of New Mexico. Center for the American West and Richard W. Etulain. The American West in the Twentieth Century: A Bibliography. Norman: University of Oklahoma Press, 1994.

MLA (9th ed.) Citation

University of New Mexico. Center for the American West and Richard W. Etulain. The American West in the Twentieth Century: A Bibliography. University of Oklahoma Press, 1994.