Damanik, Burhanuddin. “ANALISIS CUSTOMER RELATIONSHIP MANAGEMENT (CRM) DALAM PENINGKATAN PELANGGAN HOTEL”. JURNAL MAHAJANA INFORMASI 3, no. 2 (January 25, 2019): 1–10. Accessed November 21, 2024. https://e-journal.sari-mutiara.ac.id/index.php/7/article/view/412.