Putra, M. irlansyah, K. R. Silalahi, P. Sinabutar, and O. J. Harmaja. “Analysis and Design of Web-Based MSME Cashier Application Using the Waterfall Model”. Jurnal Sistem Informasi Dan Ilmu Komputer, vol. 8, no. 1, Sept. 2024, pp. 309-17, https://jurnal.unprimdn.ac.id/index.php/JUSIKOM/article/view/5353.