↑ 1,0 1,1 European Union (инг.). The World Factbook. Central Intelligence Agency (2010-11-03). — «Because of the great differences in per capita income among member states (from $7,000 to $78,000) and historic national animosities, the EU faces difficulties in devising and enforcing common policies.» 1 ноябрь 2010 тикшерелгән.