FITHRI, Prima; YENI, Niffy Eri. Analisis Pengendalian Kualitas pada Engine Boss Drive Face K44F dengan Metode Six Sigma di PT. Sparta Guna Sentosa. Jurnal Optimasi Sistem Industri, [S. l.], v. 15, n. 2, p. 105–113, 2016. DOI: 10.25077/josi.v15.n2.p105-113.2016. Disponível em: https://josi.ft.unand.ac.id/index.php/josi/article/view/227. Acesso em: 2 apr. 2025.