United States. Office of the Federal Register. (1973). United States government manual. Office of the Federal Register.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. Office of the Federal Register. United States Government Manual. Washington, D.C: Office of the Federal Register, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States. Office of the Federal Register. United States Government Manual. Office of the Federal Register, 1973.
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