Heron, A. (1979). Planning early childhood care and education in developing countries. Unesco, International Institute for Educational Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Heron, Alastair. Planning Early Childhood Care and Education in Developing Countries. Paris: Unesco, International Institute for Educational Planning, 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Heron, Alastair. Planning Early Childhood Care and Education in Developing Countries. Unesco, International Institute for Educational Planning, 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.