1. OCED Fact book 2011-2012: Economic, Environmental and Social Statistics
2. Workbook of Historical Data 1985-2013 – Electricity Generation: Statistical Review of World Energy; 2014
3. CIA World Factbook; 2009
4. CEA report, Ministry of Power, Govt. of India; 2015
5. International Energy Agency (IEA). World Outlook 2007. IEA publications; 2007