LIKHAR, W.; PURWANTO, H. ANALISA DAN PERANCANGAN SISTEM INFORMASI TICKETING HELPDESK ONLINE BERBASIS WEB: STUDI KASUS PT XYZ. JSI (Jurnal sistem Informasi) Universitas Suryadarma, [S. l.], v. 8, n. 2, p. 103–116, 2021. DOI: 10.35968/jsi.v8i2.719. Disponível em: https://journal.universitassuryadarma.ac.id/index.php/jsi/article/view/719. Acesso em: 25 jun. 2025.