M. M. R. . Sutikno and M. . Suryawinata, “Application for Selling Food and Beverage Products in CSDW Restaurants Based on Android: Aplikasi Penjualan Produk Makanan dan Minuman di Rumah Makan CSDW Berbasis Android”, acopen, vol. 3, p. 10.21070/acopen.3.2020.743, Aug. 2021.