(Apichit Ngamkom), P. B. (2026) “SYSTEMIC STUDENT LEADERSHIP DEVELOPMENT FOR ENHANCING LEARNER QUALITY: A CONCEPTUAL FRAMEWORK FOR SCHOOLS UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE NAKHON SI THAMMARAT”, Journal of MCU Nakhondhat. Nakhon Si Thammarat, Thailand, 13(10), pp. 341–350. available at: https://so03.tci-thaijo.org/index.php/JMND/article/view/304661 (accessed: 28 September 2026).