1. Budget of the U.S. Government. A New Foundation for American Greatness. https://www.whitehouse.gov/sites/whitehouse.gov/files/omb/budget/fy2018/budget.pdf. Accessed 25 May 2017.
2. US Agency for International Development: Foreign Aid Explorer. https://explorer.usaid.gov/aid-dashboard.html. Accessed 19 April 2017.
3. The white man's burden: why the West's efforts to aid the rest have done so much ill and so little good;WR Easterly,2006
4. Do Corrupt Governments Receive Less Foreign Aid? http://www.nber.org/papers/w7108.pdf. Accessed 19 April 2017.
5. The great escape: health, wealth, and the origins of inequality;A Deaton,2013