Ngamsom, S. “DEVELOPMENT OF AN ALTERNATIVE SYSTEM FOR THAI INSTRUCTORS USING ENGLISH AS A MEDIUM OF INSTRUCTION”. Journal of Humanities and Social Sciences Thonburi University, vol. 13, no. 1, Jan. 2019, pp. 9-20, https://so03.tci-thaijo.org/index.php/trujournal/article/view/166578.