Sriranacon, J., Phrakhuchairattanakorn, and A. Silpanilmalaya. “Personnel Administration Based on the Four Principles of Kindly Treatment of School Administrators under Roi Et Informal and Non-Formal Education Promotion Office”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 10, no. 1, Nov. 2020, pp. 574-85, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/243500.