A. S. A. Diana, B. E. Soetjipto, and M. Churiyah, “Analysis Of The Influence Of Product Quality And Promotion & Reward Programs On Customer Loyalty Through Customer Satisfaction In Gold Savings Customers At BSI: Systematic Literature Review (SLR) With Bibliometrics”, ECBIS, vol. 4, no. 5, pp. 1485–1504, May 2026.