Phumang, N., & Chansirisira, P. (2020). THE DEVELOPMENT OF GUIDELINE TO STRENGTHEN TEACHERS’ COMPETENCY OF LEARNING MANAGEMENT IN SCHOOLS UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE 26. Journal of MCU Nakhondhat, 7(6), 323–337. Retrieved from https://so03.tci-thaijo.org/index.php/JMND/article/view/244551