Thwaites, R. G. (1904). A brief history of Rocky mountain exploration: With especial reference to the expedition of Lewis and Clark. D. Appleton and company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThwaites, Reuben Gold. A Brief History of Rocky Mountain Exploration: With Especial Reference to the Expedition of Lewis and Clark. New York: D. Appleton and company, 1904.
एमएलए (8वां संस्करण) प्रशस्ति पत्रThwaites, Reuben Gold. A Brief History of Rocky Mountain Exploration: With Especial Reference to the Expedition of Lewis and Clark. D. Appleton and company, 1904.
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