Toole, K. R. (1972). Twentieth-century Montana: A State of extremes ([1st ed.].). University of Oklahoma Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रToole, K. Ross. Twentieth-century Montana: A State of Extremes. [1st ed.]. Norman: University of Oklahoma Press, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रToole, K. Ross. Twentieth-century Montana: A State of Extremes. [1st ed.]. University of Oklahoma Press, 1972.
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