Hasibuan, I. F., Ramadhani, S., & Syakir, A. (2025). Excellent Service in Attracting and Retaining Customers at PT BPRS Al-Washliyah Medan. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 8(2), 7126-7144. https://doi.org/10.31538/iijse.v8i2.7054