Widianto, Yonatan, Robby Kurniawan Budhi, and Kevin Cornelius. “Marketplace Application Analysis And Design Of Paid Software And Web-Based Shareware Services”. JOINCS (Journal of Informatics, Network, and Computer Science) 5, no. 1 (April 29, 2022): 10-13. Accessed May 9, 2024. https://joincs.umsida.ac.id/index.php/joincs/article/view/1593.