Não informado. (1971). Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Language Speech and Hearing Services in Schools. Washington: American Speech-Language-Hearing Association, 1971.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Language Speech and Hearing Services in Schools. American Speech-Language-Hearing Association, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.