Yampray, J. ., S. . Chaychit, and S. . Yonphan. “Factors Affecting the Operation of Child Development Center under Subdistrict Administrative Organization, Phetchaburi Province”. NU Journal of Nursing and Health Sciences, vol. 14, no. 1, Apr. 2020, pp. 66-79, https://he01.tci-thaijo.org/index.php/NurseNu/article/view/226719.