LAYLI ROHMATILLAH; ZAINUR RIDHO. EFEKTIVITAS MANAJEMEN LAYANAN PRIMA IBADAH UMRAH PT. NUR HARAMAIN MULIA. HARAMAIN: Jurnal Manajemen Bisnis, [S. l.], v. 1, n. 01, p. 53–61, 2021. DOI: 10.66931/jmb-78. Disponível em: https://e-journal.ibama.ac.id/index.php/jmb/article/view/78. Acesso em: 8 sep. 2026.