United States. Forest Service & Journey Past (Firm). (1997). Crossroads: Images of the Colville Valley, 1800-1850. Journey Past.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service और Journey Past (Firm). Crossroads: Images of the Colville Valley, 1800-1850. [S.l.]: Journey Past, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service और Journey Past (Firm). Crossroads: Images of the Colville Valley, 1800-1850. Journey Past, 1997.
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