PURWANTO, H. RANCANGAN SISTEM INFORMASI PENJUALAN BARANG KOPERASI XYZ. JSI (Jurnal sistem Informasi) Universitas Suryadarma, [S. l.], v. 6, n. 1, p. 83–111, 2019. DOI: 10.35968/jsi.v6i1.278. Disponível em: https://journal.universitassuryadarma.ac.id/index.php/jsi/article/view/278. Acesso em: 20 okt. 2025.