Cita APA (7th ed.)
ebrary, Inc. (2010). The Economist pocket world in figures (2011 ed.). Profile : in association with The Economist Ltd..
Cita Chicago (17th ed.)
ebrary, Inc. The Economist Pocket World in Figures. 2011 ed. London, England: Profile : in association with The Economist Ltd., 2010.
Cita MLA (9th ed.)
ebrary, Inc. The Economist Pocket World in Figures. 2011 ed. Profile : in association with The Economist Ltd., 2010.
Atenció: Aquestes cites poden no estar 100% correctes.