“ANALISA KUALITAS COOLING WATER PADA COOLING WATER SYSTEM DI BUTADIENE PLANT PT XYZ DENGAN METODE SIX SIGMA DAN PDCA”. Jurnal Intent: Jurnal Industri dan Teknologi Terpadu 1, no. 1 (November 30, 2018): 45–57. Accessed October 3, 2025. http://ejournal.lppm-unbaja.ac.id/index.php/intent/article/view/252.