Dorling, D. (2013). Population 10 billion. Constable & Robinson Ltd.
Lua i Stíl Chicago (17ú heag.)Dorling, D. Population 10 Billion. Constable & Robinson Ltd, 2013.
Lua MLA (9ú heag.)Dorling, D. Population 10 Billion. Constable & Robinson Ltd, 2013.
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