Mekanisme Penanganan Customer service terhadap Complaint Nasabah (Studi Kasus pada Bank Sumatera Utara Cabang Syariah): Customer service Handling Mechanism for Customer Complaints (Case Study at North Sumatra Bank Sharia Branch). Exp. Stud. Exp [Internet]. 2023 Jan. 12 [cited 2026 Feb. 10];1(1):41-7. Available from: https://jurnal.institutsunandoe.ac.id/index.php/ESE/article/view/120