“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): 1–8. Accessed June 17, 2026. https://ejournal.jurnalist.org/index.php/jureti/article/view/100.