“Pengaruh Kualitas Produk, Kualitas Pelayanan, dan Relationship Quality Terhadap Kesetiaan Nasabah pada Bank Syariah Indonesia”, SUNAN GIRI, vol. 12, no. 112, pp. 103–125, Dec. 2017, Accessed: Oct. 21, 2025. [Online]. Available: https://journal.unsuri.ac.id/index.php/jkk/article/view/663