Pengendalian Kualitas Palm Kernel Oil (PKO) Menggunakan Metode Six Sigma Di PT. Letawa. Jurnal Rekayasa Sistem Industri & Manajemen, [S. l.], v. 2, n. 1, p. 75–82, 2024. DOI: 10.33096/jrsim.v2i1.557. Disponível em: https://jurnal.fti.umi.ac.id/index.php/JRSI/article/view/557. Acesso em: 7 apr. 2026.