Não informado. (1980). Industrial Management and Data Systems. Embankment Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Management and Data Systems. Wembley, Inglaterra: Embankment Press, 1980.
Lua MLA (8ú heag.)Não informado. Industrial Management and Data Systems. Embankment Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.