United States. Department of the Interior. Division of Information. (1963). Natural resources of Washington. U.S. Govt. Print. Off..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Department of the Interior. Division of Information. Natural Resources of Washington. [Washington: U.S. Govt. Print. Off., 1963.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Department of the Interior. Division of Information. Natural Resources of Washington. U.S. Govt. Print. Off., 1963.
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