Helmi, Yolla Rahmadi. “Peningkatan Kenyamanan Pelanggan Dengan Sistem Customer Relationship Management (CRM)”. Jurnal Sistim Informasi dan Teknologi 2, no. 2 (September 2, 2021): 59–64. Accessed July 5, 2025. http://www.jsisfotek.org/index.php/JSisfotek/article/view/23.