Gerhardt, L. N. (1981). Children's Access to Public Library Services: Prince George's County Memorial Public Library, Maryland, 1980.
Chicago-Zitierstil (17. Ausg.)Gerhardt, Lillian N. Children's Access to Public Library Services: Prince George's County Memorial Public Library, Maryland, 1980. 1981.
MLA-Zitierstil (9. Ausg.)Gerhardt, Lillian N. Children's Access to Public Library Services: Prince George's County Memorial Public Library, Maryland, 1980. 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.