APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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