Goodlad, J. I., & Anderson, R. H. (1987). The nongraded elementary school (Rev. edition, Reissued with a new introd.). Teachers College, Columbia University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Goodlad, John I., و Robert Henry Anderson. The Nongraded Elementary School. Rev. edition, Reissued with a new introd. New York: Teachers College, Columbia University, 1987.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Goodlad, John I., و Robert Henry Anderson. The Nongraded Elementary School. Rev. edition, Reissued with a new introd. Teachers College, Columbia University, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.