Sopyan, Dedi, MaarifM. Syamsul, AffandiJoko, and ArsyiantiLaily Dwi. “Nurturing The Ecosystem of Hajj and Umrah Business in Indonesia: A Model For Development”. Indonesian Journal of Business and Entrepreneurship (IJBE) 9, no. 3 (September 13, 2023): 359. Accessed May 20, 2024. https://jurnal.ipb.ac.id/index.php/ijbe/article/view/46427.