Yopi Putra, Ayu Puspitarini, Edi Yusuf Wirawan, Emil R. Kaburuan*, Gunawan Wang. 2020. “Designing the Gamification Framework to Increase Sales Motivation at PT XYZ”. International Journal of Control and Automation 13 (02), 1063 -70. http://sersc.org/journals/index.php/IJCA/article/view/26883.