APA (7 वां संस्करण) प्रशस्ति पत्र
Freeman-Bell , G., & Balkwill , J. (1996). Management in engineering: Principles and practice (2nd ed.). Prentice-Hall of India.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Freeman-Bell , Gail, और James Balkwill. Management in Engineering: Principles and Practice. 2nd ed. New Delhi: Prentice-Hall of India, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Freeman-Bell , Gail, और James Balkwill. Management in Engineering: Principles and Practice. 2nd ed. Prentice-Hall of India, 1996.
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