APA (7th ed.) Citation

Unruh, J. D. (1979). The plains across: The overland emigrants and the trans-Mississippi West, 1840-60. University of Illinois Press.

Chicago Style (17th ed.) Citation

Unruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. Urbana: University of Illinois Press, 1979.

MLA (9th ed.) Citation

Unruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. University of Illinois Press, 1979.