Mahardika, Fajar, and Muhammad Labib Abdillah. “Design of Unified Modeling Language Information System for Motorcycle Unit Selling and Buying Transactions Using the Waterfall Method”. Hanif Journal of Information Systems 1, no. 2 (February 15, 2024): 37–48. Accessed April 20, 2026. https://journal.ilmubersama.com/index.php/hanif/article/view/15.