Não informado. (1977). Exceptional Child Education Resources. Council for Exceptional Children.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Exceptional Child Education Resources. Reston, Va: Council for Exceptional Children, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Exceptional Child Education Resources. Council for Exceptional Children, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.