el hefny, a. (1965). decision making systems in management. National Planning Institute.
Cita Chicago (17th ed.)el hefny, amina. Decision Making Systems in Management. cairo: National Planning Institute, 1965.
Cita MLA (9th ed.)el hefny, amina. Decision Making Systems in Management. National Planning Institute, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.