Paynog, S., and S. Sakorn. “Developing the 21st Century Learning Administration Management Guidelines for Schools under the Secondary Educational Service Area Office 20”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 10, no. 2, June 2021, pp. 785-98, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/247346.