Não informado. (2009). Intellectual and Developmental Disabilities. American Association on Intellectual and Developmental Disabilities.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Intellectual and Developmental Disabilities. Washington: American Association on Intellectual and Developmental Disabilities, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Intellectual and Developmental Disabilities. American Association on Intellectual and Developmental Disabilities, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.