Nurjaman, K., Supriatna, E. and Rojudin (2025) “Quality Assurance Model of Hajj and Umrah Guidance Groups (KBIHU) Based on Islamic Boarding Schools in Serving Prospective Pilgrims: A Case Study of KBIHU Organized by Islamic Boarding Schools in West Java Province”, TEC EMPRESARIAL, 20(1), pp. 102–116. Available at: http://revistas.tec-ac.cr/index.php/tec_empresarial/article/view/540 (Accessed: 3 July 2026).