Koontz, H. (1978). Essentials of management/2e (2nd ed.). McGraw Hill.
शिकागो स्टाइल उद्धरणKoontz, Harold. Essentials of Management/2e. 2nd ed. New Delhi: McGraw Hill, 1978.
एमएलए उद्धरणKoontz, Harold. Essentials of Management/2e. 2nd ed. McGraw Hill, 1978.
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