Aklimawati, L. and Wahyudi, T. (2013) “Effect of Price Determinants on World Cocoa Prices for Over the Last Three Decades: Error Correction Model (ECM) Approach”, Pelita Perkebunan (a Coffee and Cocoa Research Journal), 29(3). doi: 10.22302/iccri.jur.pelitaperkebunan.v29i3.15.