Hayat, A., and U. Riyandho. “RANCANG BANGUN SISTEM INFORMASI PENJUALAN BERBASIS WEB PADA PT SAMATOR GAS INDUSTRI”. Journal of Innovation And Future Technology (IFTECH), Vol. 1, no. 1, Feb. 2019, pp. 1-12, https://ejournal.lppm-unbaja.ac.id/index.php/iftech/article/view/444.