Unruh, J. D. (1979). The plains across: The overland emigrants and the trans-Mississippi West, 1840-60. University of Illinois Press.
Cita Chicago Style (17a ed.)Unruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. Urbana: University of Illinois Press, 1979.
Cita MLA (8a ed.)Unruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. University of Illinois Press, 1979.
Precaución: Estas citas no son 100% exactas.