Thornton, R. (1959). British shipping. University Press.
Lua i Stíl Chicago (17ú heag.)Thornton, RH. British Shipping. Cambridge [Eng]: University Press, 1959.
Lua MLA (9ú heag.)Thornton, RH. British Shipping. University Press, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.