UPAYA UPAYA MEMPERTAHANKAN LOYALITAS PELANGGAN PADA PT. PERTAMINA LUBRICANTS REGION IV SEMARANG (Pada Produk Fastron). Solusi, [S. l.], v. 18, n. 3, 2020. DOI: 10.26623/slsi.v18i3.2606. Disponível em: https://journals.usm.ac.id/index.php/solusi/article/view/2606. Acesso em: 22 apr. 2025.