Cita APA

The Economist. (2007). El mundo en cifras (ed. 2008.). London: The Economist Newspaper.

Citación estilo Chicago

The Economist. El Mundo En Cifras. ed. 2008. London: The Economist Newspaper, 2007.

Cita MLA

The Economist. El Mundo En Cifras. ed. 2008. London: The Economist Newspaper, 2007.