Adelia, Katika, and Rosnaida Rosnaida. 2026. “Pengaruh Kualitas Produk, Harga Dan Kualitas Pelayanan Terhadap Keputusan Pembelian Pada PT Graha Informatika Nusantara Sumatera Utara”. SCIENTIFIC JOURNAL OF REFLECTION : Economic, Accounting, Management and Business 9 (3):1220-28. https://doi.org/10.37481/sjr.v9i3.1544.