ebrary, Inc. (2008). The Economist pocket world in figures (2009 ed.). Profile Books.
芝加哥风格引文ebrary, Inc. The Economist Pocket World in Figures. 2009 ed. London: Profile Books, 2008.
MLA引文ebrary, Inc. The Economist Pocket World in Figures. 2009 ed. Profile Books, 2008.
警告：这些引文格式不一定是100％准确.