Não informado. (1964). Training in business and industry. Gellert Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Training in Business and Industry. New York: Gellert Publishing, 1964.
Lua MLA (8ú heag.)Não informado. Training in Business and Industry. Gellert Publishing, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.