Wannapakhe, B., and S. Noilit. “Self-Development Guidelines for Teachers under the Jurisdiction of the Mahasarakham Office of Primary Education Area 1”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 9, no. 2, July 2019, pp. 159-68, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/244695.