National Research Council (U.S.). Panel to Review the Status of Basic Research on School-Age Children & Collins, W. A. (1984). Development during middle childhood: The years from six to twelve. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Panel to Review the Status of Basic Research on School-Age Children و W. Andrew Collins. Development During Middle Childhood: The Years from Six to Twelve. Washington, D.C.: National Academy Press, 1984.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Panel to Review the Status of Basic Research on School-Age Children و W. Andrew Collins. Development During Middle Childhood: The Years from Six to Twelve. National Academy Press, 1984.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.