Não informado. (1992). Professional Manager. Institute of Management Foundation.
Lua i Stíl Chicago (17ú heag.)Não informado. Professional Manager. London: Institute of Management Foundation, 1992.
Lua MLA (8ú heag.)Não informado. Professional Manager. Institute of Management Foundation, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.