el hefny, a. (1965). decision making systems in management. National Planning Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रel hefny, amina. Decision Making Systems in Management. cairo: National Planning Institute, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रel hefny, amina. Decision Making Systems in Management. National Planning Institute, 1965.
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