Center, C. C. A. o. P. C. I. (1976). The Catholic Church of Philadelphia and a guide to the historic sites. Philadelphia.
Chicago-referens (17:e uppl.)Center, Catholic Church. Archdiocese of Philadelphia. Catholic Information. The Catholic Church of Philadelphia and a Guide to the Historic Sites. Philadelphia, 1976.
MLA-referens (8:e uppl.)Center, Catholic Church. Archdiocese of Philadelphia. Catholic Information. The Catholic Church of Philadelphia and a Guide to the Historic Sites. Philadelphia, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.