Spencer, R. H. (1983). Planning, implementation, and control in product test and assurance. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpencer, Richard H. Planning, Implementation, and Control in Product Test and Assurance. Englewood Cliffs, N.J: Prentice-Hall, 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpencer, Richard H. Planning, Implementation, and Control in Product Test and Assurance. Prentice-Hall, 1983.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.