Soma, AM, Ina Kartika Wati, and Heri Ispriyahadi. 2024. “Improving Digital Payment System Services: The Impact of E-Service Quality and E-Loyalty on User Preferences”. Al-Uqud : Journal of Islamic Economics 8 (2):302-13. https://doi.org/10.26740/al-uqud.v8n2.p302-313.