Nurnabila, Zahra Akilah, and Siti Khumayah. “Analysis of the Effectiveness of Priority Customer Complaint Services at BNI Emerald Services”. Indonesian Journal of Advanced Research 5, no. 1 (January 31, 2026): 129–142. Accessed June 8, 2026. https://journal.formosapublisher.org/index.php/ijar/article/view/16112.