The Economist. (2006). The economist pocket world in figures 2007 (2007 edition.). The Economist in association with Profile Books.
Cita Chicago (17th ed.)The Economist. The Economist Pocket World in Figures 2007. 2007 edition. London: The Economist in association with Profile Books, 2006.
Cita MLA (9th ed.)The Economist. The Economist Pocket World in Figures 2007. 2007 edition. The Economist in association with Profile Books, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.