Fakhira Ardini, A., E. M. P. Sianturi, and R. Aisyah. “ANALISIS PERANAN MODEL WATERFALL DALAM BISNIS APLIKASI E – COMMERCE: ANALYSIS OF THE ROLE OF WATERFALL MODELS IN E-COMMERCE BUSINESS”. Prosiding Seminar Nasional Teknologi Dan Sistem Informasi, Vol. 1, no. 1, Jan. 2022, pp. 208-13, doi:10.33005/sitasi.v1i1.149.