Hery Setyo Nuryantoro, Petrus, Irwan Sutirman Wahdiat, and Aoliyah Firasati. 2025. “Functionality, Reliability, and Effectiveness of Information Technology Services in Supporting VAT Administration”. Journal of Information Systems and Technology Research 4 (3):187-201. https://doi.org/10.55537/jistr.v4i3.1311.