Fitrianingsih, Lukieto Cahyadi, and Limega Candrasa. “Relational Marketing Management and Influence on Customer Loyalty: Empirical Evidence from Islamic Banks in North Sumatra”. Jurnal Ilmiah Manajemen Kesatuan 14, no. 1 (January 31, 2026): 855–864. Accessed June 4, 2026. https://jurnal.ibik.ac.id/index.php/jimkes/article/view/4673.