“ANALISIS TERHADAP RANCANGAN SISTEM PORTAL PROCUREMENT BERBASIS WEB DENGAN MODEL WATERFALL STUDI KASUS PT PERTAMINA (PERSERO)”. Jurnal Intelek Insan Cendikia 2, no. 3 (March 11, 2025): 4642–4655. Accessed June 13, 2026. https://jicnusantara.com/index.php/jiic/article/view/2735.