Wiratama, Jansen, and Fenina Tobing. “Analysis and Design of an Web-Based Ticketing Service Helpdesk at Food and Packaging Machinery Company”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi 13, no. 1 (August 3, 2022): 19-28. Accessed November 21, 2024. https://ejournals.umn.ac.id/index.php/SI/article/view/2656.