Putri, Alfirdausya, Sri Ermelia, and Lily Harahap. “Comparative Analysis Of Digital Marketing On Customer Loyalty At SUMSELPOST And MATTANEWS”. Jurnal Fokus Manajemen 5, no. 3 (August 3, 2025): 493-502. Accessed August 20, 2025. https://jurnal.unived.ac.id/index.php/fokusman/article/view/9205.