Pennsylvania Railroad & Louisiana Purchase Exposition. (1905). The Pennsylvania railroad system at the Louisiana Purchase Exposition: Locomotive tests and exhibits, Saint Louis, Missouri, 1904. Pennsylvania Railroad Co..
Chicago-referens (17:e uppl.)Pennsylvania Railroad och Louisiana Purchase Exposition. The Pennsylvania Railroad System at the Louisiana Purchase Exposition: Locomotive Tests and Exhibits, Saint Louis, Missouri, 1904. Philadelphia: Pennsylvania Railroad Co., 1905.
MLA-referens (8:e uppl.)Pennsylvania Railroad och Louisiana Purchase Exposition. The Pennsylvania Railroad System at the Louisiana Purchase Exposition: Locomotive Tests and Exhibits, Saint Louis, Missouri, 1904. Pennsylvania Railroad Co., 1905.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.