United States. Forest Service. Pacific Northwest Region. (1975). Steamboatin' on the Snake. U.S. Forest Service, Wallowa-Whitman National Forest.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. Pacific Northwest Region. Steamboatin' on the Snake. Baker, Or.: U.S. Forest Service, Wallowa-Whitman National Forest, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Forest Service. Pacific Northwest Region. Steamboatin' on the Snake. U.S. Forest Service, Wallowa-Whitman National Forest, 1975.
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