Ferris, J. E. (1953). Early outposts of the fur trade empire: The Hudson Bay Company, Spokane House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFerris, Joel Edward. Early Outposts of the Fur Trade Empire: The Hudson Bay Company, Spokane House. Spokane, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFerris, Joel Edward. Early Outposts of the Fur Trade Empire: The Hudson Bay Company, Spokane House. 1953.
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