Amirul Amri, Zainal Ruma, Muhammad Ilham Wardhana Haeruddin, Burhanuddin, and Muh. Ichwan Musa. “The Effect of Implementing a Digital Payment System on Sales of the Kopma Business Unit ‘Alma mater’ at Makassar State University”. Journal of Finance and Business Digital 2, no. 1 (June 8, 2023): 81–96. Accessed May 1, 2026. https://journal.formosapublisher.org/index.php/jfbd/article/view/2491.