Nurhasanah Febriyanti Harahap, et al. “Implementation of Integrated Information System in Optimization of Public Services in The Regional Revenue Agency of Deli Serdang”. EPaper Bisnis : International Journal of Entrepreneurship and Management , vol. 2, no. 2, June 2025, pp. 123-8, doi:10.61132/epaperbisnis.v2i2.373.