Judijanto, Loso, Heppy Agustiana Vidyastuti, Rini Hadiyati, and Mesak Yandri Masela. “Development of a Data-Based Customer Relationship Management (CRM) Model to Increase Customer Loyalty in the E-Commerce Sector”. West Science Information System and Technology 2, no. 03 (December 31, 2024): 390–397. Accessed March 14, 2025. http://wsj.westsciences.com/index.php/wsist/article/view/1523.