Implementation of the Waterfall Method on a Website-Based Sales System. Informatics and Computer Engineering Journal, [S. l.], v. 2, n. 1, p. 29–38, 2022. DOI: 10.31294/icej.v2i1.631. Disponível em: https://jurnal.bsi.ac.id/index.php/ijec/article/view/631. Acesso em: 11 may. 2025.