Saenghiran, Paninee. “A Development of Competencies and Indicators for Administrators of Private Vocational Education in Eastern Economic Corridor (EEC) Area”. Journal of Humanities and Social Sciences Thonburi University 14, no. 3 (August 31, 2020): 52–62. Accessed May 2, 2024. https://so03.tci-thaijo.org/index.php/trujournal/article/view/242562.