United States. Bureau of Land Management. Four Rivers Field Office. (2005). Snake River birds of prey. U.S. Dept. of the Interior, Bureau of Land Management, Four Rivers Field Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Bureau of Land Management. Four Rivers Field Office. Snake River Birds of Prey. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Land Management, Four Rivers Field Office, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Bureau of Land Management. Four Rivers Field Office. Snake River Birds of Prey. U.S. Dept. of the Interior, Bureau of Land Management, Four Rivers Field Office, 2005.
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