(1999). Library of Congress classification. L. Education / prepared by the Cataloging Policy and Support Office, Library Services.
Citace podle Chicago (17th ed.)Library of Congress Classification. L. Education / Prepared by the Cataloging Policy and Support Office, Library Services. 1999.
Citace podle MLA (9th ed.)Library of Congress Classification. L. Education / Prepared by the Cataloging Policy and Support Office, Library Services. 1999.
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