Heyel, C. (1958). Appraising executive performance. American Management Association.
शिकागो स्टाइल उद्धरणHeyel, Carl. Appraising Executive Performance. New York: American Management Association, 1958.
एमएलए उद्धरणHeyel, Carl. Appraising Executive Performance. American Management Association, 1958.
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