Ramadhan R, Afandi A. Effectiveness of Using QRIS Payment as a Digital Payment Solution in Coffee Shop Business (Case Study of Circle Coffee Medan Coffee Shop). IIJSE [Internet]. 4Apr.2025 [cited 21Apr.2026];8(2):4371-87. Available from: https://e-journal.uac.ac.id/index.php/iijse/article/view/6750