Nurohman, Dede, Nadia Roosmalita Sari, Risdiana Himmati, and Riduan Mas'ud , trans. “Marketing Strategy of Umrah Travel Agent and Religious Attitude in Indonesia”. International Journal of Scientific Research and Management (IJSRM) 11, no. 02 (February 4, 2023): 4528–4529. Accessed June 15, 2025. https://www.ijsrm.net/index.php/ijsrm/article/view/4455.