Purba, Jan Horas Veryady, and Sulistiono Sulistiono. “Pengaruh Pelayanan Dan Kualitas Produk Terhadap Loyalitas Pelanggan”. Jurnal Ilmiah Manajemen Kesatuan 1, no. 1 (April 24, 2013): 85–92. Accessed May 2, 2024. https://jurnal.ibik.ac.id/index.php/jimkes/article/view/257.