PURBA, M. M. PERANCANGAN ENTERPRISE COLLABORATION SYSTEM DENGAN KONSEP GAMIFIKASI. JSI (Jurnal sistem Informasi) Universitas Suryadarma, [S. l.], v. 4, n. 1, p. 105–113, 2018. DOI: 10.35968/jsi.v4i1.77. Disponível em: https://journal.universitassuryadarma.ac.id/index.php/jsi/article/view/77. Acesso em: 11 sep. 2025.