Wicha, K. ., and S. . Lapcharoen. “Soft Skills of School Administrators in the Secondary Educational Service Area Office Samut Prakan”. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, vol. 12, no. 1, June 2024, pp. 44-57, https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/270180.