Não informado. (1992). Professional Manager. Institute of Management Foundation.
Chicago-referens (17:e uppl.)Não informado. Professional Manager. London: Institute of Management Foundation, 1992.
MLA-referens (8:e uppl.)Não informado. Professional Manager. Institute of Management Foundation, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.