Trayangkul, V., Trakulkasemsuk, P., & Wongsakul, S. (2022). The School Administrators’ Competencies Affecting Academic Administration in School Teachers’ Opinions Under The Office of Secondary Educational Service area 3. Saengtham College Journal, 14(2), 279–299. Retrieved from https://so01.tci-thaijo.org/index.php/scj/article/view/264091