Não informado. (1962). Industrial safety. United Trade Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Safety. London: United Trade Press, 1962.
Lua MLA (8ú heag.)Não informado. Industrial Safety. United Trade Press, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.