Kirk, R. (1996). The enduring forests: Northern California, Oregon, Washington, British Columbia, and Southeast Alaska. Mountaineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKirk, Ruth. The Enduring Forests: Northern California, Oregon, Washington, British Columbia, and Southeast Alaska. Seattle, WA: Mountaineers, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKirk, Ruth. The Enduring Forests: Northern California, Oregon, Washington, British Columbia, and Southeast Alaska. Mountaineers, 1996.
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