Sopin Piyachat โสภิณ ปิยชาติ, and Jirapon Jiyajun จิรพล จิยะจันทร์. 2018. “The Model of Marketing Strategy Affects to the Effectiveness of Private Higher Education in Bangkok”. Dusit Thani College Journal 12 (1):233-48. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/118129.