Newnan, D. G. (1991). Engineering economic analysis (4th ed.). Engineering Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNewnan, Donald G. Engineering Economic Analysis. 4th ed. San Jose, Calif: Engineering Press, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNewnan, Donald G. Engineering Economic Analysis. 4th ed. Engineering Press, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.