sokibi, Petrus. 2016. “Pembuatan Perangkat Lunak Sistem Informasi Penjualan Tunai Berbasis WEB Di PT. Propan Raya Cirebon”. ITEJ (Information Technology Engineering Journals) 1 (2), 34 - 45. https://doi.org/10.24235/itej.v1i2.9.