Pandiangan T, Pohan S, Panggabean YTU. The Influence of Service Quality and Brand Image on Increasing Mobile Phone Sales at Mitracell Store, Sibolga. JEMA [Internet]. 2026 Feb. 22 [cited 2026 Feb. 26];3(01):57-63. Available from: https://jurnal.devitara.or.id/index.php/ekonomi/article/view/336