SAFAR, Suryani; 						ACHYANI, Yuni Eka.
 Sistem Informasi Pembelian Dengan Metode Waterfall Pada PT. Koyorad Jaya Indonesia  Bekasi.
<strong>INFORMATION MANAGEMENT FOR EDUCATORS AND PROFESSIONALS : Journal of Information Management</strong>, [S.l.], v. 3, n. 1, p. 41-50, dec. 2018.
ISSN 2548-3331.
Available at: &lt;<a href="https://ejournal-binainsani.ac.id/index.php/IMBI/article/view/1008" target="_new">https://ejournal-binainsani.ac.id/index.php/IMBI/article/view/1008</a>&gt;. Date accessed: 10 july 2026.