Theisen, J. (1971). Library of Congress classification schedules: A cumulation of additions and changes through 1970 ([1st ed.].). Gale Research.
Chicago-Zitierstil (17. Ausg.)Theisen, Jean. Library of Congress Classification Schedules: A Cumulation of Additions and Changes Through 1970. [1st ed.]. Detroit: Gale Research, 1971.
MLA-Zitierstil (9. Ausg.)Theisen, Jean. Library of Congress Classification Schedules: A Cumulation of Additions and Changes Through 1970. [1st ed.]. Gale Research, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.