Não informado. (2011). Education and Training in Mental Retardation. Council for Exceptional Children, Division on Mental Retardation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Education and Training in Mental Retardation. Reston, Va: Council for Exceptional Children, Division on Mental Retardation, 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Education and Training in Mental Retardation. Council for Exceptional Children, Division on Mental Retardation, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.