Layli Rohmatillah and Wilda Tul Uluf 2025. Umrah Worship Service Strategy Management at PT Darul Arqam Travel Tour Kraksaan Probolinggo. HARAMAIN: Jurnal Manajemen Bisnis. 5, 01 (Jan. 2025), 09–19. DOI:https://doi.org/10.66931/jmb-167.