Hult, R. E. (1957). Lost mines and treasures of the Pacific Northwest. Binfords & Mort.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHult, Ruby El. Lost Mines and Treasures of the Pacific Northwest. Portland, Or.: Binfords & Mort, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHult, Ruby El. Lost Mines and Treasures of the Pacific Northwest. Binfords & Mort, 1957.
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