APA (7th ed.) Citation

Milner, C. A., O'Connor, C. A., & Sandweiss, M. A. (1994). The Oxford history of the American West. Oxford University Press.

Chicago Style (17th ed.) Citation

Milner, Clyde A,, Carol A. O'Connor, and Martha A. Sandweiss. The Oxford History of the American West. New York [etc.]: Oxford University Press, 1994.

MLA (9th ed.) Citation

Milner, Clyde A,, et al. The Oxford History of the American West. Oxford University Press, 1994.