Cintya, Cindy, and R.Fanry Siahaan. “Implementation of the Client-Server System for Ordering Food and Beverages With the Android Platform Using the Waterfall Method (Case Study: Maxx Coffee Prima Ap Kualanamu Store)”. Journal of Intelligent Decision Support System (IDSS) 3, no. 3 (September 30, 2020): 31-39. Accessed June 10, 2026. https://www.idss.iocspublisher.org/index.php/jidss/article/view/13.