Clark, D. E. (1937). The West in American history. Thomas Y. Crowell company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रClark, Dan Elbert. The West in American History. New York: Thomas Y. Crowell company, 1937.
एमएलए (8वां संस्करण) प्रशस्ति पत्रClark, Dan Elbert. The West in American History. Thomas Y. Crowell company, 1937.
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