Kanpakdee, Pornsawan. “Situation Leadership of the School Administration Affecting the Core Competency of Teacher Under the Secondary Education Service Area Office Supanburi”. Journal of Dhamma for Life 31, no. 3 (September 7, 2025): 671–685. accessed September 2, 2026. https://so08.tci-thaijo.org/index.php/dhammalife/article/view/4611.