Siahaan, R. A., Areros, W. A. and Sambul, S. A. P. (2020) “Kualitas Pelayanan terhadap Kepuasan Pelanggan Kartu Halo di PT. Telkomsel Grapari Cabang Manado”, Productivity, 1(4), pp. 350–354. Available at: https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/30102 (Accessed: 22 November 2024).