Gidley, M. (1981). Kopet: A documentary narrative of Chief Joseph's last years. University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGidley, M. Kopet: A Documentary Narrative of Chief Joseph's Last Years. Seattle: University of Washington Press, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGidley, M. Kopet: A Documentary Narrative of Chief Joseph's Last Years. University of Washington Press, 1981.
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