Innovation in Hajj and Umrah. The Arab Journal of Administration, Cairo, v. 44, n. 6, p. 71–80, 2024. DOI: 10.21608/aja.2024.255670.1569. Disponível em: https://ajajournal.org/index.php/aja/article/view/594. Acesso em: 29 apr. 2026.