Jati, Misnawi. 2009. “Changes in Procyanidins and Tannin Concentration As Affected by Cocoa Liquor Roasting”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 25 (2). https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v25i2.134.