Παραπομπή σε μορφή APA (7η εκδ.)

Dittmann, H., & Hardy, J. (2007). Learn Library of Congress classification (2nd North American ed.). TotalRecall Publications, Inc..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Dittmann, Helena, και Jane Hardy. Learn Library of Congress Classification. 2nd North American ed. Friendswood, Tex: TotalRecall Publications, Inc., 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Dittmann, Helena, και Jane Hardy. Learn Library of Congress Classification. 2nd North American ed. TotalRecall Publications, Inc., 2007.