Yampray, Jirachaya, Supaporn Chaychit, and Sasikan Yonphan. 2020. “Factors Affecting the Operation of Child Development Center under Subdistrict Administrative Organization, Phetchaburi Province”. NU Journal of Nursing and Health Sciences 14 (1):66-79. https://he01.tci-thaijo.org/index.php/NurseNu/article/view/226719.