Sangsuk, Pattarajittra, Ornuma Charoensuk, and Chaiyut Kleebbua. “A Causal Model of Learning Achievement of Upper Primary Students With Learning Engagement As a Mediator Variable”. Kasetsart Journal of Social Sciences 43, no. 2 (April 30, 2022): 337‒344. Accessed May 6, 2024. https://so04.tci-thaijo.org/index.php/kjss/article/view/258546.