Laksanasut, S., . P. . Seubsang, and P. . Ngiwline. “The Effects of Gamified Learning Activities on English Learning Achievement of Grade 9 Students at Demonstration School of Suan Sunandha Rajabhat University”. Journal of Modern Learning Development, vol. 6, no. 3, May 2021, pp. 29-43, https://so06.tci-thaijo.org/index.php/jomld/article/view/248274.