Yopi Putra, Ayu Puspitarini, Edi Yusuf Wirawan, Emil R. Kaburuan*, Gunawan Wang. “Designing the Gamification Framework to Increase Sales Motivation at PT XYZ”. International Journal of Control and Automation 13, no. 02 (June 1, 2020): 1063 - 1070. Accessed June 30, 2024. http://sersc.org/journals/index.php/IJCA/article/view/26883.