Putra, A. R., S. Arifin, and D. Darmawan. “Gamification-Based Learning That Preserves Cooperation and Empathy Among Employees”. International Journal of Service Science, Management, Engineering, and Technology, vol. 5, no. 1, Aug. 2024, pp. 43-50, http://ejournalisse.com/index.php/isse/article/view/229.