APA (7th ed.) Citation

Gressley, G. M. (1966). The American West: A reorientation. [University of Wyoming].

Chicago Style (17th ed.) Citation

Gressley, Gene M. The American West: A Reorientation. [Laramie]: [University of Wyoming], 1966.

MLA (8th ed.) Citation

Gressley, Gene M. The American West: A Reorientation. [University of Wyoming], 1966.