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Cita Chicago (17th ed.)World Health Organization. Regional Office for Europe i Inc ebrary. Health and the Environment in Europe: Progress Assesment. Copenhagen: WHO Regional Office for Europe, 2010.
Cita MLA (9th ed.)World Health Organization. Regional Office for Europe i Inc ebrary. Health and the Environment in Europe: Progress Assesment. WHO Regional Office for Europe, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.