1. Government of Kenya. Economic survey, 2009: Ministry of Planning and National Development. Nairobi, Kenya: Government printer; 2009.
2. United States. The world Factbook 2009, Central Intelligence Agency; 2009.
3. Government of Kenya. Economic survey, 2008: Ministry of planning and national development. Nairobi, Kenya: Government printer; 2008.
4. IEA. Energy Balances of non-OECD Contries, Paris: International Energy Agency; 2007.
5. Government of Kenya. Kenya Investment Conference: Ministry of Planning, 22–23rd July, 2008.