Kusumawati, Aulia, and Lailatul Fitriyeni. “Pengendalian Kualitas Proses Pengemasan Gula Dengan Pendekatan Six Sigma”. Jurnal Sistem dan Manajemen Industri 1, no. 1 (August 5, 2017): 43-48. Accessed September 21, 2020. https://e-jurnal.lppmunsera.org/index.php/JSMI/article/view/173.