Determination of Cocoa Powder Quality Produced by Small-Medium Enterprise Using Six Sigma Analysis. Pelita Perkebunan (a Coffee and Cocoa Research Journal), [S. l.], v. 37, n. 2, p. 137–145, 2021. Disponível em: https://mail.ccrjournal.com/index.php/ccrj/article/view/480. Acesso em: 30 apr. 2026.