Porncharoong R, Sangmookda S. The Characteristics of Professional Administrator Affecting the Efficiency Teacher’s Performance in the School Under the Secondary Education Service Area Office Nonthabury. Journal of Dhamma for Life [internet]. 2025 Aug. 11 [cited 2026 Sep. 3];31(3):195-218. available from: https://so08.tci-thaijo.org/index.php/dhammalife/article/view/4617