SIAHAAN, R. A.; AREROS, W. A.; SAMBUL, S. A. P. Kualitas Pelayanan terhadap Kepuasan Pelanggan Kartu Halo di PT. Telkomsel Grapari Cabang Manado. Productivity, [S. l.], v. 1, n. 4, p. 350–354, 2020. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/30102. Acesso em: 22 nov. 2024.