Ismail, W., & Strong, N. (1983). Teacher assessments on the impact of programmed learning in American secondary education. University of San Francisco.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ismail, Wedad, و Nathan Strong. Teacher Assessments on the Impact of Programmed Learning in American Secondary Education. San Francisco: University of San Francisco, 1983.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ismail, Wedad, و Nathan Strong. Teacher Assessments on the Impact of Programmed Learning in American Secondary Education. University of San Francisco, 1983.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.