Rangkuti, Haris Munandar, and Nasib Marbun. “Implementation of a Desktop-Based Sales Information System Using the Waterfall Method”. Journal of Computer Networks, Architecture and High Performance Computing 7, no. 1 (January 11, 2025): 138–150. Accessed September 3, 2026. https://itscience-indexing.com/jurnal/index.php/CNAPC/article/view/4064.