WEB-BASED GUEST VISIT MANAGEMENT INFORMATION SYSTEM AT THE NORTH SUMATRA CITY ENVIRONMENT AND FORESTRY OFFICE. ProTekInfo(Pengembangan Riset dan Observasi Teknik Informatika), [S. l.], v. 13, n. 2, p. 9–15, 2026. DOI: 10.30656/6vq4rt91. Disponível em: https://e-jurnal.lppmunsera.org/index.php/ProTekInfo/article/view/12476. Acesso em: 9 oct. 2026.