Não informado. (1978). Viewpoints in teaching and learning. Indiana University, School of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Viewpoints in Teaching and Learning. Bloomington, Ind: Indiana University, School of Education, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Viewpoints in Teaching and Learning. Indiana University, School of Education, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.