Lekwongmaneepun, Udomsak, Chuanchom Chinatangkul, and Kamolmal Chaisiritanya. “The Causal Relationship Model Affecting the Effectiveness of the Secondary Schools under the Office of Basic Education Commission in Central Part of Thailand”. Ph.D. in Social Sciences Journal 12, no. 2 (August 27, 2022): 454–468. Accessed May 2, 2024. https://so05.tci-thaijo.org/index.php/phdssj/article/view/240769.