Joosten, Joosten, and Hita Hita. 2023. “OPERATIONAL INFORMATION SYSTEM DESIGN AT SIGAR JAYA FOTOCOPY”. Jurnal Sistem Informasi Dan Ilmu Komputer 7 (1):1-7. https://doi.org/10.34012/jurnalsisteminformasidanilmukomputer.v7i1.3501.