APA

Library of Congress, Library of Congress, . (2000). Library of Congress classification. Washington, D.C: Library of Congress, Cataloging Distribution Service.

Chicago

Library of Congress, Library of Congress, . 2000. Library of Congress classification. Washington, D.C: Library of Congress, Cataloging Distribution Service.

Harvard

Library of Congress, Library of Congress, . (2000). Library of Congress classification. Washington, D.C: Library of Congress, Cataloging Distribution Service.

MLA

Library of Congress, Library of Congress, . Library of Congress classification. Washington, D.C: Library of Congress, Cataloging Distribution Service. 2000.