United States Library of Congress. (1995). Subject headings (18th ed.). Library of Congress, Cataloging Distribution Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States Library of Congress. Subject Headings. 18th ed. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1995.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited States Library of Congress. Subject Headings. 18th ed. Library of Congress, Cataloging Distribution Service, 1995.
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