Maharani, Risna, and Hendri Irawan. 2018. “DESAIN SISTEM INFORMASI PENJUALAN TRADING POLYURETHANE FOAM BERORIENTASI OBJEK STUDI KASUS: PT. TUGU MAS ABADI”. IDEALIS : InDonEsiA JournaL Information System 1 (1):50-56. https://jom.fti.budiluhur.ac.id/IDEALIS/article/view/56.