“Analysis of Quality Control of White Tofu Products Using the Six Sigma Method at the Tofu Factory UD. Al Jaliil in Balikpapan City”. Jurnal Manajemen Agribisnis dan Agroindustri 5, no. 1 (June 30, 2025): 9–16. Accessed July 23, 2026. https://jmaa.polije.ac.id/index.php/journal/article/view/v5i1-b.