Sawyer, A. (2020). Hiking waterfalls Oregon: A guide to the state's best waterfall hikes (Second edition.). FalconGuides.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSawyer, Adam. Hiking Waterfalls Oregon: A Guide to the State's Best Waterfall Hikes. Second edition. Guilford: FalconGuides, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSawyer, Adam. Hiking Waterfalls Oregon: A Guide to the State's Best Waterfall Hikes. Second edition. FalconGuides, 2020.
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