el hefny, a. (1965). decision making systems in management. National Planning Institute.
Citazione stile Chigago Style (17a edizione)el hefny, amina. Decision Making Systems in Management. cairo: National Planning Institute, 1965.
Citatione MLA (9a ed.)el hefny, amina. Decision Making Systems in Management. National Planning Institute, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.