FREEMAN-BELL, G. (1996). Management In Engineering. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFREEMAN-BELL, Gail. Management In Engineering. Prentice-Hall, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFREEMAN-BELL, Gail. Management In Engineering. Prentice-Hall, 1996.
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