PANDIANGAN, Tiorida; POHAN, Safriadi; PANGGABEAN, Yusi Tri Utari. The Influence of Service Quality and Brand Image on Increasing Mobile Phone Sales at Mitracell Store, Sibolga. Journal of Economics, Management and Accounting (JEMA) , [S. l.], v. 3, n. 01, p. 57–63, 2026. Disponível em: https://jurnal.devitara.or.id/index.php/ekonomi/article/view/336. Acesso em: 26 feb. 2026.