Não informado. (2011). Education and Training in Mental Retardation. Council for Exceptional Children, Division on Mental Retardation.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Education and Training in Mental Retardation. Reston, Va: Council for Exceptional Children, Division on Mental Retardation, 2011.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Education and Training in Mental Retardation. Council for Exceptional Children, Division on Mental Retardation, 2011.
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