APA aipamena

U. S. Library of Congress. Subject Cataloging Division, Gale Research Company, Library of Congress. Subject Cataloging Division, & Savage, H. (1973). Library of Congress Classification schedules, a cumulation of additions and changes, 1971-1972. Class C: Auxiliary sciences of history. Gale Research Company.

Chicago Style aipamena

U. S. Library of Congress. Subject Cataloging Division, Gale Research Company, Library of Congress. Subject Cataloging Division, and Helen Savage. Library of Congress Classification Schedules, a Cumulation of Additions and Changes, 1971-1972. Class C: Auxiliary Sciences of History. Detroit, Michigan: Gale Research Company, 1973.

MLA aipamena

U. S. Library of Congress. Subject Cataloging Division, et al. Library of Congress Classification Schedules, a Cumulation of Additions and Changes, 1971-1972. Class C: Auxiliary Sciences of History. Gale Research Company, 1973.