Ulima Febriani, Achmad Syarifudin, and Emi Puspita Dewi. “The Role of Tour Leaders in Providing Comfort for Umrah Pilgrims at Pt Bina Insani Madinah (BIM Group) Tour & Travel”. International Journal of Health, Economics, and Social Sciences (IJHESS), Vol. 8, no. 3, May 2026, p. 1583~1586, doi:10.56338/ijhess.v8i3.10996.