Tumanggor, Ahmad AlfanSori, and Nurul Aulia. “Employee Leave Application System for DPRD Office of North Sumatra Province”. Jurnal Metrokom : Media Teknik Elektro dan Komputer 2, no. 1 (June 30, 2025): 18–31. Accessed May 1, 2026. https://ejournal.ypayb.or.id/index.php/metrokom/article/view/115.