Sriranacon J, Phrakhuchairattanakorn, Silpanilmalaya A. Personnel Administration Based on the Four Principles of Kindly Treatment of School Administrators under Roi Et Informal and Non-Formal Education Promotion Office. AJMBU [Internet]. 2020 Nov. 25 [cited 2024 Apr. 24];10(1):574-85. Available from: https://so01.tci-thaijo.org/index.php/AJMBU/article/view/243500