U.N. Office on Drugs and Crime. 2013. Colombia: Coca Cultivation Survey 2012. Vienna, Austria: United Nations Office On Drugs and Crime. Retrieved June 20, 2014 (http://www.unodc.org/documents/crop-monitoring/Colombia/Colombia_Coca_Cultivation_Survey_2012_web.pdf).
CNN.com. 2004.“Annan: World Has Become More Unequal.” Retrieved June 20, 2014 (http://www.cnn.com/2004/WORLD/americas/06/12/annan.un/).
