Romano, C. (2007). Columbia Highlands: Exploring Washington's last frontier. Conservation Northwest : Mountaineers Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRomano, Craig. Columbia Highlands: Exploring Washington's Last Frontier. Seattle, Wash.: Conservation Northwest : Mountaineers Books, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRomano, Craig. Columbia Highlands: Exploring Washington's Last Frontier. Conservation Northwest : Mountaineers Books, 2007.
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