Gray, J. (1999). Improving schools: Performance and potential. Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGray, John. Improving Schools: Performance and Potential. Buckingham, Philadelphia: Open University Press, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGray, John. Improving Schools: Performance and Potential. Open University Press, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.