- See http://www.taxjustice.net/cms/upload/pdf/Ghana_0906_Report_printer_friendly.pdf
- See http://www.revenuewatch.org/sites/default/files/IBP%20-%20A%20Guide%20to%20Tax%20Work%20for%20NGOs.pdf
- Christian Aid, False Profits: Robbing the Poor to Keep the Rich Tax Free, 2009.
- See http://comtrade.un.org
- See www.gao.gov/new.items/d09157.pdf
- See www.globalreporting.org