Christian Hamdani, Laura Kurniawan, Berty Marcelina, Irwan Wijaya Emil R. Kaburuan, Gunawan Wang, Sfenrianto. 2020. “Transforming Human Capital Management System Through Gamification”. International Journal of Advanced Science and Technology 29 (05), 8244-50. http://sersc.org/journals/index.php/IJAST/article/view/18475.