DWI NURILAHIAH; NURSERI HASNAH NASUTION; ANANG WALIAN. Strategi Pemasaran PT. Zafa Mulia Mandiri Palembang Dalam Menghadapi Persaingan Harga Antara Penyelenggara Perjalanan Ibadah Umrah (PPIU). ULIL ALBAB : Jurnal Ilmiah Multidisiplin, [S. l.], v. 2, n. 8, p. 3663–3670, 2023. DOI: 10.56799/jim.v2i8.2034. Disponível em: https://journal-nusantara.com/index.php/JIM/article/view/2034. Acesso em: 21 may. 2024.