Piyarit, R., Wongboon-ngam, N. and Devahastin na ayudhya, R. (2026) “The development of instructional model in the next normal era based on self-directed learning and gamification to promote student engagement of graduate students”, Journal of Humanities and Social Sciences Review , 27(2), pp. 7–15. available at: https://so05.tci-thaijo.org/index.php/hspbruacthjournal/article/view/286205 (accessed: 28 September 2026).