Khumjan, S. . ., Juithong, S., Nilnopkoon, P. . ., & Klangphahol, K. . (2019). The Study on the Factors of the Learning Management Model Enhancing Productive Learning Competence in Economics of Grade 9 Students. Muban Chombueng Rajabhat University Research Journal (Humanities and Social Science), 7(2), 127–143. Retrieved from https://so03.tci-thaijo.org/index.php/hssj/article/view/248265