Usanto U, Nurlaela L, Sopian A, Alfiah F. Umrah Registration System Using Extreme Programming Method Towards Worship Tourism. IJCITSM [Internet]. 2022 Aug. 23 [cited 2026 Feb. 2];3(1):22-31. Available from: https://iiast.iaic-publisher.org/ijcitsm/index.php/IJCITSM/article/view/104