Mekarkakorn, Tawica, Suwanna Narkwiboonwong, and Wandee Suthinarak. “A causal model development of professional teachers in vocational education”. Kasetsart Journal of Social Sciences 40, no. 2 (August 30, 2019): 509–518. accessed October 7, 2026. https://so04.tci-thaijo.org/index.php/kjss/article/view/242214.