Sawangsri, Benchaporn, and Prinya Gerdpanya. 2021. “Study of the Effectiveness of Online Learning and the Academic Achievement of Undergraduate Students”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES) 6 (2). ฺBangkok, Thailand:273-90. https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/251430.