Churney, M., & Williams, S. (1996). Bogs, meadows, marshes & swamps: A guide to 25 wetland sites of Washington State. Mountaineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChurney, Marie, और Susan Williams. Bogs, Meadows, Marshes & Swamps: A Guide to 25 Wetland Sites of Washington State. Seattle, Wash.: Mountaineers, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChurney, Marie, और Susan Williams. Bogs, Meadows, Marshes & Swamps: A Guide to 25 Wetland Sites of Washington State. Mountaineers, 1996.
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