ISTIQAMAH. IMPLEMENTASI CUSTOMER RELATIONSHIP MANAGEMENT DALAM MENINGKATKAN EFEKTIVITAS PENGHIMPUNAN ZAKAT DI LAZNAS INISIATIF ZAKAT INDONESIA (IZI) CABANG KALIMANTAN TIMUR . Journal of Innovation in Management and Marketing, [S. l.], v. 1, n. 1, p. 41–52, 2025. Disponível em: https://ejournal.sembilanpemuda.id/index.php/jiimm/article/view/1014. Acesso em: 25 may. 2026.