ไสยรส ร, สุนทร ส. Motivation Affecting the Competencies of Teacher and Educational Personnel in the Offi f ice of Roi-et Primary Educational Service Area 3. MGSJ [Internet]. 2019 Mar. 12 [cited 2024 Apr. 29];16(1):31-40. Available from: https://so04.tci-thaijo.org/index.php/mgsj/article/view/177132