Trayangkul, Varaporn, Prapawan Trakulkasemsuk, and Supawadee Wongsakul. “The School Administrators’ Competencies Affecting Academic Administration in School Teachers’ Opinions Under The Office of Secondary Educational Service area 3”. Saengtham College Journal 14, no. 2 (December 20, 2022): 279–299. Accessed April 29, 2024. https://so01.tci-thaijo.org/index.php/scj/article/view/264091.