RR Sonya Dewi Wulandari, Ali Khatibi, Jacquline Tham, S. M. Ferdous Azam and Cicilia Windiyaningish 2023. Marketing Mix Strategy to Increase Outpatient Loyalty at the Hajj Hospital Jakarta Indonesia. Central Asian Journal of Medical and Natural Science. 4, 5 (Sep. 2023), 204-221.