“DESIGN OF CUSTOMER DATA MANAGEMENT INFORMATION SYSTEM FOR CNOP AND OLO USING THE WATERFALL MODEL (Case Study: PT. Telkom)”. Jurnal Riset Teknik Informatika 2, no. 2 (May 25, 2026): 314–323. Accessed August 6, 2026. https://ejournal.jurnalist.org/index.php/jureti/article/view/100.