Nurjaman K, Supriatna E, Rojudin. 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 Empre Journal [Internet]. 2025 Mar. 5 [cited 2026 Jul. 3];20(1):102-16. Available from: http://revistas.tec-ac.cr/index.php/tec_empresarial/article/view/540