APA (7th ed.) Citation

Evans, H. E. (1997). The natural history of the Long Expedition to the Rocky Mountains (1819-1820). Oxford University Press.

Chicago Style (17th ed.) Citation

Evans, Howard Ensign. The Natural History of the Long Expedition to the Rocky Mountains (1819-1820). New York: Oxford University Press, 1997.

MLA (9th ed.) Citation

Evans, Howard Ensign. The Natural History of the Long Expedition to the Rocky Mountains (1819-1820). Oxford University Press, 1997.