MAHYUNI MIRAZA; HARMEN NASUTION; ISKANDARINI. INTERNAL AND EXTERNAL FACTORS AFFECTING CUSTOMER LOYALTY OF BANK SUMUT. International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS), [S. l.], v. 4, n. 1, p. 237–245, 2024. DOI: 10.54443/ijebas.v4i1.1426. Disponível em: https://radjapublika.com/index.php/IJEBAS/article/view/1426. Acesso em: 28 nov. 2025.