Ewers, J. C. (1955). George Catlin, painter of Indians and the West. Government Printing Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEwers, John C. George Catlin, Painter of Indians and the West. Washington, D.C.: Government Printing Office, 1955.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEwers, John C. George Catlin, Painter of Indians and the West. Government Printing Office, 1955.
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