Mekarkakorn T, Narkwiboonwong S, Suthinarak W. A causal model development of professional teachers in vocational education. kasetsart J. Soc. Sci. [internet]. 2019 Aug. 30 [cited 2026 Oct. 7];40(2):509-18. available from: https://so04.tci-thaijo.org/index.php/kjss/article/view/242214