Sander. John W. Garrett and the Baltimore and Ohio Railroad. Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Sander. John W. Garrett and the Baltimore and Ohio Railroad. Johns Hopkins University Press.
Lua MLA (9ú heag.)Sander. John W. Garrett and the Baltimore and Ohio Railroad. Johns Hopkins University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.