RANCANGANSISTEM INFORMASI E-PROCUREMENT BERORIENTASI OBJECT ( STUDI KASUS : PT. KRAKATAU TIRTA INDUSTRI ). j.ilm.Sains.Teknologi [Internet]. 2018 Sep. 21 [cited 2025 Jun. 23];2(2):76-98. Available from: https://ejournal.lppm-unbaja.ac.id/index.php/saintek/article/view/97