Firmanto H, Kumalasari Y, Muarrofah Z. Determination of Cocoa Powder Quality Produced by Small-Medium Enterprise Using Six Sigma Analysis. PelitaPerkebunan [Internet]. 1Aug.2021 [cited 17Jul.2024];37(2):137-45. Available from: https://ccrjournal.com/index.php/ccrj/article/view/480