Web Based Sales Information System Using the Waterfall Method for Cashier and Product Management. Journal of Digital Technology and Computer Science, [S. l.], v. 3, n. 1, p. 29–48, 2025. DOI: 10.61220/digitech.v3i1.20253. Disponível em: https://journal.lontaradigitech.com/index.php/Digitech/article/view/1227. Acesso em: 14 oct. 2025.