Nurmalasari, Novita, and Leonardo Indra Vitaharsa. “Pengaruh Kualitas Produk, Persepsi Harga Dan Kualitas Pelayanan Terhadap Keputusan Pembelian Di Kopi Kenangan Sudirman”. Journal of Economics, Bussiness and Management Issues 1, no. 4 (September 27, 2024): 273–284. Accessed April 26, 2025. https://economics.pubmedia.id/index.php/jebmi/article/view/363.