Susilawati, Ririn, and Ziyadatul Iffatis Silmi. “Analisis Customer Relationship Management (CRM) Dalam Meningkatkan Jumlah Nasabah KSU BTM Surya Amanah Jombang”. BISEI : Jurnal Bisnis dan Ekonomi Islam 7, no. 2 (December 14, 2022): 105–112. Accessed July 3, 2024. https://ejournal.unhasy.ac.id/index.php/bisei/article/view/3653.