United States. Office of the Federal Register & United States. National Archives and Records Administration. Code of federal regulations. U.S. G.P.O.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Office of the Federal Register और United States. National Archives and Records Administration. Code of Federal Regulations. Washington: U.S. G.P.O.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. Office of the Federal Register और United States. National Archives and Records Administration. Code of Federal Regulations. U.S. G.P.O.
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