1. Energy economics: concepts, issues, markets and governance;Bhattacharyya,2011
2. BP statistical review of world energy;British Petroleum,2014
3. International energy statistics;US Energy Information Administration,2015
4. Head of center for energy and mineral resources data and information;Ministry of Energy and Mineral Resources, Handbook of Energy & Economic Statistics of Indonesia,2014
5. A quest for energy security in the 21st century;Asia Pacific Energy Research Centre,2007