Grant, H. R. (2005). The railroad: The life story of a technology. Greenwood Press.
Lua i Stíl Chicago (17ú heag.)Grant, H. Roger. The Railroad: The Life Story of a Technology. Westport, Conn.: Greenwood Press, 2005.
Lua MLA (9ú heag.)Grant, H. Roger. The Railroad: The Life Story of a Technology. Greenwood Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.