Não informado. (1936). Mine and Quarry Engineering. Tothill Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Mine and Quarry Engineering. London: Tothill Press, 1936.
Lua MLA (8ú heag.)Não informado. Mine and Quarry Engineering. Tothill Press, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.