APA (7th ed.) Zitazioa
ebrary, Inc. (2008). The Economist pocket world in figures (2009 ed.). Profile Books.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc. The Economist Pocket World in Figures. 2009 ed. London: Profile Books, 2008.
MLA (9th ed.) Zitazioa
ebrary, Inc. The Economist Pocket World in Figures. 2009 ed. Profile Books, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.