Eifert, L. (2000). Field guide to old-growth forests: Exploring ancient forest ecosystems from California to the Pacific Northwest. Sasquatch Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEifert, Larry. Field Guide to Old-growth Forests: Exploring Ancient Forest Ecosystems from California to the Pacific Northwest. Seattle, Wash.: Sasquatch Books, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEifert, Larry. Field Guide to Old-growth Forests: Exploring Ancient Forest Ecosystems from California to the Pacific Northwest. Sasquatch Books, 2000.
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