Khamsen, Nirada, and Sopon Pechrpuang. “RELATIONSHIPS BETWEEN TEAMWORK AND WORKING HAPPINESS OF TEACHERS UNDER TRANG PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2”. Journal of MCU Nakhondhat 11, no. 6 (June 11, 2024): 1–12. accessed December 9, 2025. https://so03.tci-thaijo.org/index.php/JMND/article/view/277524.