Niyomvit, K., C. Klaojang, J. Wannachot, and C. Tarmong. “The Development of Operational Guideline for Enhancing Early Childhood Well Being at the Child Development Center, Phrapokklao Nursing College, Chanthaburi”. Journal of Phrapokklao Nursing College, Chanthaburi, vol. 30, no. 1, May 2019, pp. 15-26, https://he01.tci-thaijo.org/index.php/pnc/article/view/168496.