Khumjan S, Juithong S, Nilnopkoon P, Klangphahol K. The Study on the Factors of the Learning Management Model Enhancing Productive Learning Competence in Economics of Grade 9 Students. HSSJ [Internet]. 2019 Dec. 23 [cited 2024 May 19];7(2):127-43. Available from: https://so03.tci-thaijo.org/index.php/hssj/article/view/248265