“Pengaruh Kualitas Produk, Kualitas Pelayanan, Dan Relationship Quality Terhadap Kesetiaan Nasabah Pada Bank Syariah Indonesia”. SUNAN GIRI: Jurnal Kajian Keislaman 17, no. 114 (December 19, 2017): 103–125. Accessed October 21, 2025. https://journal.unsuri.ac.id/index.php/jkk/article/view/693.