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 E-F. History: America. Gale Research Company.
Citação norma ChicagoU. 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 E-F. History: America. Detroit, Michigan: Gale Research Company, 1973.
Citação norma MLAU. S. Library of Congress. Subject Cataloging Division, et al. Library of Congress Classification Schedules, a Cumulation of Additions and Changes, 1971-1972. Class E-F. History: America. Gale Research Company, 1973.