APA (7th ed.) Citation

Jones, G. A., & Weeks, E. H. (1973). An Expansion of Library of Congress Classes PT 2600-2688.

Chicago Style (17th ed.) Citation

Jones, Gerda Annemarie, and Elizabeth H. Weeks. An Expansion of Library of Congress Classes PT 2600-2688. 1973.

MLA (9th ed.) Citation

Jones, Gerda Annemarie, and Elizabeth H. Weeks. An Expansion of Library of Congress Classes PT 2600-2688. 1973.

Warning: These citations may not always be 100% accurate.