1. Peter Drucker sets us straight;Drucker;Fortune Magazine,2004
2. Organization for Economic Co-operation and Development (OECD). (2004). Accelerating pro-poor growth through support for private sector development. OECD.
3. The end of poverty: Economic possibilities for our time;Sachs,2005
4. An enquiry into the nature and causes of the wealth of nations;Smith,1904