Ichwani, A. ., N. . Anwar, K. Karsono, and M. Alrifqi. “Sistem Informasi Penjualan Berbasis Website Dengan Pendekatan Metode Prototype”. Prosiding SISFOTEK, vol. 5, no. 1, Sept. 2021, pp. 1 - 6, http://seminar.iaii.or.id/index.php/SISFOTEK/article/view/249.