Saihon, Gogi Kurniawan, dan Hafidulloh. “The Influence Of E-Procurement On The Performance Effectiveness Of Civil Servants In The Surabaya City Government”. Improvement: Jurnal Manajemen dan Bisnis 5, no. 2 (September 18, 2025): 110–117. Diakses September 30, 2026. https://journal.um-surabaya.ac.id/improvement/article/view/27781.