Dorling, D. (2013). Population 10 billion. Constable & Robinson Ltd.
Cita Chicago (17th ed.)Dorling, D. Population 10 Billion. Constable & Robinson Ltd, 2013.
Cita MLA (9th ed.)Dorling, D. Population 10 Billion. Constable & Robinson Ltd, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.