Aprilia, Ariesya. “Customer Retention &Amp; Customer Relationship Marketing: Strategi Pemasaran Yang Potensial”. Jurnal Manajemen Maranatha 4, no. 1 (March 16, 2015). Accessed January 18, 2025. http://224305.koshikahk.tech/index.php/jmm/article/view/99.