Wolf, E. (1976). "At the instance of Benjamin Franklin": A brief history of the Library Company of Philadelphia, 1731 - 1976. Library Company of Philadelphia.
Chicago-Zitierstil (17. Ausg.)Wolf, Edwin. "At the Instance of Benjamin Franklin": A Brief History of the Library Company of Philadelphia, 1731 - 1976. Philadelphia: Library Company of Philadelphia, 1976.
MLA-Zitierstil (9. Ausg.)Wolf, Edwin. "At the Instance of Benjamin Franklin": A Brief History of the Library Company of Philadelphia, 1731 - 1976. Library Company of Philadelphia, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.