Ergler, P. C. (1970). The role of contract engineering in technical manpower planning. American Management Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रErgler, Paul C. The Role of Contract Engineering in Technical Manpower Planning. [New York]: American Management Association, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रErgler, Paul C. The Role of Contract Engineering in Technical Manpower Planning. American Management Association, 1970.
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