OECD Factbook. Ref HC10 .O34 2011-2012. Economic, Environmental and Social Stats.
African Economic Outlook: 2011. Ref HC800.A1 A3733 2011. Economic Stats.
Africa Development Indicators: 2011. Ref HC800.A1 A3562 2011. Infrastructure, labor, agriculture, human development stats.
World Energy Outlook: 2011. Ref HD9502,A2 W6694 2011. Energy supply and demand by country and fuel sector.
Oil Information: 2010. Ref HD9575.A12 O68 2010.
Energy Statistics of OECD Countries: 2010. Ref HD9540.4 .O73 2010
Energy Balances of OECD Countries: 2010. Ref HD9502.A1 O74a 2010