Ferris, W. A., Auerbach, H. S., & Alter, J. C. (1940). Life in the Rocky mountains, 1830-1835. Rocky Mountain Book Shop.
Cita Chicago Style (17a ed.)Ferris, Warren Angus, Herbert S. Auerbach, y J. Cecil Alter. Life in the Rocky Mountains, 1830-1835. Salt Lake City, Utah: Rocky Mountain Book Shop, 1940.
Cita MLA (8a ed.)Ferris, Warren Angus, et al. Life in the Rocky Mountains, 1830-1835. Rocky Mountain Book Shop, 1940.
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