APA (7th ed.) Citation

Simonin, L. (1966). The Rocky Mountain West in 1867. University of Nebraska Press.

Chicago Style (17th ed.) Citation

Simonin, Louis. The Rocky Mountain West in 1867. Lincoln: University of Nebraska Press, 1966.

MLA (9th ed.) Citation

Simonin, Louis. The Rocky Mountain West in 1867. University of Nebraska Press, 1966.