KOONTZ, H. (1982). Essentials Of Management Harold Koontz, Cyril O'donnell And Heinz Weihrich. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKOONTZ, Harold. Essentials Of Management Harold Koontz, Cyril O'donnell And Heinz Weihrich. McGraw-Hill, 1982.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKOONTZ, Harold. Essentials Of Management Harold Koontz, Cyril O'donnell And Heinz Weihrich. McGraw-Hill, 1982.
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