APA-referens (7:e uppl.)

Pennsylvania Historical Association. Pennsylvania history. Pennsylvania Historical Association, etc.].

Chicago-referens (17:e uppl.)

Pennsylvania Historical Association. Pennsylvania History. [University Park, Pa., etc.: Pennsylvania Historical Association, etc.].

MLA-referens (8:e uppl.)

Pennsylvania Historical Association. Pennsylvania History. Pennsylvania Historical Association, etc.].

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.