APA (7th ed.) Citation

Theisen, J. (1971). Library of Congress classification schedules: A cumulation of additions and changes through 1970 (4th ed.). Gale Research.

Chicago Style (17th ed.) Citation

Theisen, Jean. Library of Congress Classification Schedules: A Cumulation of Additions and Changes Through 1970. 4th ed. Detroit: Gale Research, 1971.

MLA (9th ed.) Citation

Theisen, Jean. Library of Congress Classification Schedules: A Cumulation of Additions and Changes Through 1970. 4th ed. Gale Research, 1971.