Pengaruh Kualitas Pelayanan Dan Kualitas Produk Terhadap Loyalitas Nasabah PT. Bank Sumut Unit Usaha Syariah Kota Medan. Al-Ihsan: Jurnal Bisnis dan Ekonomi Syariah, [S. l.], v. 3, n. 1, p. 30–43, 2025. Disponível em: https://ihsan.yrpk.org/index.php/jbes/article/view/29. Acesso em: 23 jul. 2025.