Pardede, Franz, Nicholas Marpaung, and Onan Siregar. “Pengaruh Harga, Kualitas Produk, Dan Kualitas Pelayanan Terhadap Keputusan Pembelian”. Jurnal Ilmiah Wahana Pendidikan 11, no. 6.A (June 1, 2025): 222-234. Accessed June 2, 2026. https://jurnal.peneliti.net/index.php/JIWP/article/view/10552.