Pandiangan, Tiorida, Safriadi Pohan, and Yusi Tri Utari Panggabean. “The Influence of Service Quality and Brand Image on Increasing Mobile Phone Sales at Mitracell Store, Sibolga”. Journal of Economics, Management and Accounting (JEMA) 3, no. 01 (February 22, 2026): 57–63. Accessed February 26, 2026. https://jurnal.devitara.or.id/index.php/ekonomi/article/view/336.