Musa, Chalid Imran. “Pengaruh Relationship Marketing Terhadap Customer Retention Orientation Pada Mahasiswa Universitas X”. Ilmiah Manajemen Bisnis 9, no. 1 (February 13, 2014). Accessed May 3, 2026. https://ejournal.ukrida.ac.id/index.php/IMB/article/view/549.