Estes, L. S. (1999). Observation guide for Driscoll and Nagel, early childhood education, birth-8. Boston: Allyn and Bacon.
استشهاد بنمط شيكاغوEstes, Linda S. Observation Guide for Driscoll and Nagel, Early Childhood Education, Birth-8. Boston: Allyn and Bacon, 1999.
MLA استشهادEstes, Linda S. Observation Guide for Driscoll and Nagel, Early Childhood Education, Birth-8. Boston: Allyn and Bacon, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.