Cole, D. L., & Hegrenes, J. R. (1953). Report on petroglyphs of the Dalles Reservoir. U.S. Dept. of the Interior, National Park Service, Region Four Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCole, David L., और Jack R. Hegrenes. Report on Petroglyphs of the Dalles Reservoir. San Francisco: U.S. Dept. of the Interior, National Park Service, Region Four Office, 1953.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCole, David L., और Jack R. Hegrenes. Report on Petroglyphs of the Dalles Reservoir. U.S. Dept. of the Interior, National Park Service, Region Four Office, 1953.
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