Library of Congress. Subject Cataloging Division, Martel, C., Bay, J. C., Johnston, W. D., Schmidt, A. F. W., & Wolcott, J. D. (1911). Classification. Government Printing Office.
Chicago-referens (17:e uppl.)Library of Congress. Subject Cataloging Division, Charles Martel, J. Christian Bay, William Dawson Johnston, A. F. W. Schmidt, och J. D. Wolcott. Classification. Washington: Government Printing Office, 1911.
MLA-referens (8:e uppl.)Library of Congress. Subject Cataloging Division, et al. Classification. Government Printing Office, 1911.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.