Adelia, Katika, and Rosnaida Rosnaida. “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, no. 3 (July 1, 2026): 1220-1228. Accessed October 7, 2026. https://ojspustek.org/index.php/SJR/article/view/1544.