IRSAN. Analisis Quality Control dalam Proses Pengolahan Teh Hitam dengan Metode Six Sigma. Jurnal Teknologi, [S. l.], v. 9, n. 2, 2021. DOI: 10.35134/jitekin.v9i2.12. Disponível em: https://jitekin-upiyptk.org/ojs/index.php/Teknologi/article/view/12. Acesso em: 13 jun. 2026.