Association for Educational Communications and Technology. (1989). Educational technology research and development: ETR & D. Association for Educational Communications and Technology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Association for Educational Communications and Technology. Educational Technology Research and Development: ETR & D. Washington, D.C.: Association for Educational Communications and Technology, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Association for Educational Communications and Technology. Educational Technology Research and Development: ETR & D. Association for Educational Communications and Technology, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.