Smithirak Jantarak ส. จ. “Instructional Model Development of General Education in Thai Qualifications Framework for Higher Education (TQF : Hed) of General Education Program at Dusit Thani College, Bangkok”. Dusit Thani College Journal, vol. 12, no. 1, Apr. 2018, pp. 263-78, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/118165.