THE EFFECT OF SERVICE QUALITY AND PRODUCT QUALITY ON CUSTOMER LOYALTY IN RISOL GOGO UMKM IN MEDAN CITY. ICOERESS, [S. l.], v. 2, n. 2, p. 755–761, 2026. Disponível em: https://icoeress.pasca.uinjambi.ac.id/index.php/icoeress/article/view/182.. Acesso em: 25 sep. 2026.