Designing Business Travel Information System (SIMPERNAS) Using the UML. ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK, [S. l.], v. 12, n. 1, p. 18–24, 2022. DOI: 10.51747/energy.v12i1.p18-24. Disponível em: https://e-journal.upm.ac.id/index.php/energy/article/view/energy.v12i1.p18-24. Acesso em: 25 may. 2026.