Firmanto, H., Kumalasari, Y. and Muarrofah, Z. (2021) “cocoa, cocoa powder Determination of Cocoa Powder Production Quality in Small-Medium Enterprises Processing using Six Sigma Analysis”, Pelita Perkebunan (a Coffee and Cocoa Research Journal). Available at: https://ccrjournal.com/index.php/ccrj/article/view/433 (Accessed: 22September2021).