Engel, A. (2010). Verification, validation, and testing of engineered systems. Wiley.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEngel, Avner. Verification, Validation, and Testing of Engineered Systems. Hoboken, N.J.: Wiley, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEngel, Avner. Verification, Validation, and Testing of Engineered Systems. Wiley, 2010.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.