1. United Nations Office on Drugs and Crime: World Drug Report 2007 United Nations Office on Drugs and Crime Vol 1 2007 http://www.unodc.org/pdf/research/wdr07/WDR_2007.pdf
2. United Nations AIDS Accessed November 8, 2009. (UNAIDS) 2008 Report on the Global AIDS Epidemic 2008 http://www.unaids.org/en/KnowledgeCentre/HIVData/GlobalReport/2008/
3. National AIDS Control Organization (NACO) report on cases of HIV in India 2007 http://www.nacoonline.org/Quick_Links/HIV_Data/
4. An overview of the global HIV/AIDS epidemic, with a focus on the United States;Gayle;AIDS,2000