Pattalaka N, Sopa N. English Language Competencies and Professional Competencies Development of Primary School Teachers in Mahasarakham Province, Thailand by Using Onsite Training Courses and Online Training Courses. IJSASR [internet]. 2022 May 30 [cited 2025 Dec. 9];2(3):53-64. available from: https://so07.tci-thaijo.org/index.php/IJSASR/article/view/1020