Não informado. (2009). Intellectual and Developmental Disabilities. American Association on Intellectual and Developmental Disabilities.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Intellectual and Developmental Disabilities. Washington: American Association on Intellectual and Developmental Disabilities, 2009.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Intellectual and Developmental Disabilities. American Association on Intellectual and Developmental Disabilities, 2009.
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