Kheawlek, P., B. . Chanakul, and N. . Chairueng. “ACADEMIC LEADERSHIP OF EDUCATIONAL INSTITUTION ADMINISTRATORS AFFECTING INTERNAL QUALITY ASSURANCE OF SMALL EDUCATIONAL ESTABLISHMENTS NAKHON SI THAMMARAT PRIMARY EDUCATIONAL SERVICE AREA OFFICE”. Journal of MCU Nakhondhat, vol. 10, no. 6, June 2023, pp. 106-1, https://so03.tci-thaijo.org/index.php/JMND/article/view/270308.