Não informado. (1980). Behavior research of severe developmental disabilities. North Holland Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Behavior Research of Severe Developmental Disabilities. Amsterdam: North Holland Publishing, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Behavior Research of Severe Developmental Disabilities. North Holland Publishing, 1980.
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