Ula, Muhammad, and Grace Gata. “SISTEM INFORMASI PENJUALAN PASIR PADA PANGKALAN RIO PUTRA”. IDEALIS : InDonEsiA journaL Information System 1, no. 4 (September 3, 2018): 284–289. Accessed July 2, 2025. https://jom.fti.budiluhur.ac.id/IDEALIS/article/view/1172.