Muliono, Rizki. “Centralized and Mapped GIS Web-Based Covid-19 Data Reporting Application With The Waterfall Method: (Case Study: Information Communication Department of North Sumatra Province)”. Journal of Computer Networks, Architecture and High Performance Computing 3, no. 1 (February 6, 2021): 30–41. Accessed September 4, 2026. https://itscience-indexing.com/jurnal/index.php/CNAPC/article/view/930.