Library of Congress. Subject Cataloging Division, Ellinger, W. B., & Fischer, J. (1969). Classification (Preliminary edition.). Library of Congress.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Subject Cataloging Division, Werner B. Ellinger, और John Fischer. Classification. Preliminary edition. Washington: Library of Congress, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Subject Cataloging Division, et al. Classification. Preliminary edition. Library of Congress, 1969.
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