Não informado. (1960). Production Engineers. Institution of Production Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Production Engineers. London: Institution of Production Engineers, 1960.
Lua MLA (8ú heag.)Não informado. Production Engineers. Institution of Production Engineers, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.