Le Roy, B. (1968). Northwest forts and trading posts. Washington State Historical Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLe Roy, Bruce. Northwest Forts and Trading Posts. Tacoma: Washington State Historical Society, 1968.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLe Roy, Bruce. Northwest Forts and Trading Posts. Washington State Historical Society, 1968.
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