Widtayakornbundit, S., and B.-A. . Phinaitrup. “A Study of Leadership in Educational Institution Using Dual Systems and the Effects on Personal Behavior: A Case Study of Thailand Private Vocational System”. Kasetsart Journal of Social Sciences, vol. 42, no. 3, July 2021, pp. 527-34, https://so04.tci-thaijo.org/index.php/kjss/article/view/253472.