M. I. Maulana and D. Wijayanto, “APLIKASI KASIR BERBASIS WEB DI KEDAI KOPI XYZ MENGGUNAKAN METODE WATERFALL : Web-Based Cashier Application At XYZ Coffee Shop Using The Waterfall Method”, J-SAKTI, vol. 5, no. 2, pp. 66–72, May 2023, doi: 10.33084/jsakti.v5i2.5002.