Não informado. (2001). Annual report of the Philadelphia Museums. Philadelphia Museums.
Chicago-referens (17:e uppl.)Não informado. Annual Report of the Philadelphia Museums. Philadelphia, Pa: Philadelphia Museums, 2001.
MLA-referens (8:e uppl.)Não informado. Annual Report of the Philadelphia Museums. Philadelphia Museums, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.