Casson, M. The world's first railway system. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Casson, Mark. The World's First Railway System. Oxford University Press.
Lua MLA (8ú heag.)Casson, Mark. The World's First Railway System. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.