WIRATAMA, Jansen; TOBING, Fenina Adline Twince. Analysis and Design of an Web-Based Ticketing Service Helpdesk at Food and Packaging Machinery Company. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, [S. l.], v. 13, n. 1, p. 19–28, 2022. DOI: 10.31937/si.v13i1.2656. Disponível em: https://ejournals.umn.ac.id/index.php/SI/article/view/2656. Acesso em: 18 may. 2025.