1. 〈http://worldpopulationreview.com/countries/pakistan-population/〉 dated 28-02; 2017.
2. The long-term forecast of Pakistan's electricity supply and demand: an application of long range energy alternatives planning;Usama;Energy,2015
3. Economic advisor's wing, ministry of finance;Pakistan Economic Survey 2011-12,2012
4. Economic advisor's wing, ministry of finance;Pakistan Economic Survey 2014-15,2015
5. Policy for Development of Renewable Energy for Power Generation. Ministry for water and Power, Government of Pakistan; 2006.