Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Library of Congress. Subject Cataloging Division, Charles Martel, J. Christian Bay, William Dawson Johnston, A. F. W. Schmidt, και J. D. Wolcott. Classification. Washington: Government Printing Office, 1911.

Παραπομπή σε μορφή MLA (8th εκδ.)

Library of Congress. Subject Cataloging Division, et al. Classification. Government Printing Office, 1911.