RANCANG BANGUN SISTEM INFORMASI PENJUALAN MENGGUNAKAN METODE WATERFALL. Jurnal Qua Teknika, [S. l.], v. 11, n. 1, p. 18–25, 2021. DOI: 10.35457/quateknika.v11i1.1407. Disponível em: https://ejournal.unisbablitar.ac.id/index.php/qua/article/view/1407. Acesso em: 10 dec. 2025.