Krisananda Kosim, Hermawan Lonardi, Sukma Wijaya, Emil R. Kaburuan, Gunawan Wang, Sfenrianto. “Gamification of School Education Using Mobile Apps”. International Journal of Control and Automation 13, no. 4 (May 18, 2020): 422 - 426. Accessed April 25, 2024. http://sersc.org/journals/index.php/IJCA/article/view/16458.