Trayangkul V, Trakulkasemsuk P, Wongsakul S. The School Administrators’ Competencies Affecting Academic Administration in School Teachers’ Opinions Under The Office of Secondary Educational Service area 3. Saengtham Coll. J. [internet]. 2022 Dec. 20 [cited 2026 Sep. 11];14(2):279-9. available from: https://so01.tci-thaijo.org/index.php/scj/article/view/264091