Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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