United States. Library of Congress. (1988). Library of Congress classification schedules combined with additions and changes through 1987 Class Z: Bibliography and Library Science. Gale.
Chicago-Zitierstil (17. Ausg.)United States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1987 Class Z: Bibliography and Library Science. Detroit: Gale, 1988.
MLA-Zitierstil (9. Ausg.)United States. Library of Congress. Library of Congress Classification Schedules Combined with Additions and Changes Through 1987 Class Z: Bibliography and Library Science. Gale, 1988.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.