NASUTION, A. H. Identification Internal and External Factors to Analyze Promising Strategy for Environmental-Friendly Hajj. JURNAL ILMIAH GEMA PERENCANA, [S. l.], v. 1, n. 3, 2023. DOI: 10.61860/jigp.v2i1.59. Disponível em: https://gemaperencana.id/index.php/JIGP/article/view/59. Acesso em: 17 nov. 2025.