Muhammad Umar MayaPutra, and Yusrizal. “Islamic Marketing Within the Digital Economy: Ethical and Sustainable Practices in Indonesia’s Cellular Services Sector”. EKONOMIKA SYARIAH : Journal of Economic Studies 9, no. 2 (December 31, 2025): 125–146. Accessed March 14, 2026. https://ejournal.uinbukittinggi.ac.id/index.php/febi/article/view/10101.