roll)裡做成三明治。 根據一本1987年費城圖書館公司(LibraryCompanyofPhiladelphia)出版的展覽目錄以及費城歷史學會(Historical Society of Pennsylvania)表示,費城牛肉起士三明治發源自20世紀初期,「在一小條麵包上添加香煎牛肉、洋蔥和起司」。
REDUC'D. LibraryCompanyofPhiladelphia. [2007-04-29]. (原始内容存档于2007-09-28). A More Perfect Union: Symbolizing the National Union of States. Libraryof Congress
Life of Guiteau and the Official History of the Most Exciting Case on Record: Being the Trial of Guiteau for Assassinating Pres. Garfield. Philadelphia, PA: