Sari, Ovi Hamidah. “Influence Of Marketing Mix And Customer Relationship Management On Customer Loyalty In Pt. Abc In Jakarta”. Jurnal Manajemen Bisnis dan Kewirausahaan 1, no. 2 (November 29, 2017). Accessed February 15, 2025. https://journal.untar.ac.id/index.php/jmbk/article/view/4793.