Hidy, R. W. (2004). Great Northern Railway: A history (First University of Minnesota Press ed.). University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)Hidy, Ralph W. Great Northern Railway: A History. First University of Minnesota Press ed. Minneapolis, Minn. ; London: University of Minnesota Press, 2004.
Lua MLA (9ú heag.)Hidy, Ralph W. Great Northern Railway: A History. First University of Minnesota Press ed. University of Minnesota Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.