APA

Library of Congress, Library of Congress, . (2001). Library of Congress classification: Z : bibliography, library science, information resources. Washington, DC: Library of Congress, Cataloging Policy and Support Office, Library Services.

Chicago

Library of Congress, Library of Congress, . 2001. Library of Congress classification: Z : bibliography, library science, information resources. Washington, DC: Library of Congress, Cataloging Policy and Support Office, Library Services.

Harvard

Library of Congress, Library of Congress, . (2001). Library of Congress classification: Z : bibliography, library science, information resources. Washington, DC: Library of Congress, Cataloging Policy and Support Office, Library Services.

MLA

Library of Congress, Library of Congress, . Library of Congress classification: Z : bibliography, library science, information resources. Washington, DC: Library of Congress, Cataloging Policy and Support Office, Library Services. 2001.