Elshafei, A. (1969). On The Machine Interference Problem. The Institute of National Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रElshafei, Alwalid. On The Machine Interference Problem. Cairo: The Institute of National Planning, 1969.
एमएलए (9वां संस्करण) प्रशस्ति पत्रElshafei, Alwalid. On The Machine Interference Problem. The Institute of National Planning, 1969.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.