Panjaitan, Hotman, and Djunaedi Djunaedi. 2017. “Product Advantage, Customer Relationship Marketing, and Service Quality on Customer Satisfaction of Bank Syariah Mandiri in Surabaya”. International Review of Management and Marketing 7 (4):122-30. https://econjournals.net.tr/index.php/irmm/article/view/5170.