DIRWANTO. Indonesian Hajj and Umrah Management: Policy Problems and Governance Improvement. JURNAL ILMIAH GEMA PERENCANA, [S. l.], v. 4, n. 2, p. 749–776, 2025. DOI: 10.61860/jigp.v4i2.254. Disponível em: http://gemaperencana.id/index.php/JIGP/article/view/254. Acesso em: 14 sep. 2025.