Sulaiman, Agus. “Pengembangan Sistem Informasi Public E-Marketplace Pada PT XYZ”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi 6, no. 2 (December 31, 2015): 92-101. Accessed April 25, 2024. https://ejournals.umn.ac.id/index.php/SI/article/view/225.