Wicaksono, Y. P., and B. Budiyanto. “The Effect of Product Quality, Price, and Promotion on IPhone Smartphone Purchase Decisions With Brand Image As a Moderating Variable (A Study of Generation Z STIESIA Surabaya in 2025)”. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), Vol. 9, no. 2, June 2026, pp. 15954-6, doi:10.31538/iijse.v9i2.10122.