Chandra, Adi, and Hendra Achmadi. “Maintaining Customer Lifetime Value through Cross Selling Offers With Shopping Vouchers Gimmick in the Insurance Industry by Using Logistic Regression and Decision Tree ”. Enrichment : Journal of Management 13, no. 4 (October 30, 2023): 2638-2647. Accessed July 31, 2026. https://www.enrichment.iocspublisher.org/index.php/enrichment/article/view/1601.