Feigold, A. (1965). Teaching arithmetic to slow learners and retarded. Day.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFeigold, Abraham. Teaching Arithmetic to Slow Learners and Retarded. New York: Day, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFeigold, Abraham. Teaching Arithmetic to Slow Learners and Retarded. Day, 1965.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.