Coburn, W. (1968). Pioneer cattleman in Montana: The story of the Circle C Ranch ([1st ed.].). University of Oklahoma Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoburn, Walt. Pioneer Cattleman in Montana: The Story of the Circle C Ranch. [1st ed.]. Norman: University of Oklahoma Press, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCoburn, Walt. Pioneer Cattleman in Montana: The Story of the Circle C Ranch. [1st ed.]. University of Oklahoma Press, 1968.
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