Yudyanto, Hendy, and Fithra Faisal Hastiadi. 2017. “Analysis of the Imposition of Export Tax on Indonesian Cocoa Beans: Impact on the Processed Cocoa Export Indonesia and Malaysia”. International Journal of Economics and Financial Issues 7 (5):552-60. https://www.econjournals.com/index.php/ijefi/article/view/5524.