Davidson, G. C. (1918). The North West company. University of California press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavidson, Gordon Charles. The North West Company. Berkeley: University of California press, 1918.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDavidson, Gordon Charles. The North West Company. University of California press, 1918.
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