Não informado. (1980). Behavior research of severe developmental disabilities. North Holland Publishing.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Behavior Research of Severe Developmental Disabilities. Amsterdam: North Holland Publishing, 1980.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Behavior Research of Severe Developmental Disabilities. North Holland Publishing, 1980.
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