Tanakawesin, J., V. panyasai, and S. Rotjananiti. “GUIDELINES FOR THE MANAGEMENT OF THE CORE SCHOOLS BY USING SYSTEMATIC THEORY”. Journal of MCU Nakhondhat, vol. 7, no. 7, July 2020, pp. 259-74, https://so03.tci-thaijo.org/index.php/JMND/article/view/245013.