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Lua i Stíl Chicago (17ú heag.)Busch, Klaus, agus Wilhelm Knelangen. "German Euroscepticism: Klaus Busch. Wilhelm Knelangen." Euroscepticism : Party Politics, National Identity and European Integration.(2004) .
Lua MLA (8ú heag.)Busch, Klaus, agus Wilhelm Knelangen. "German Euroscepticism: Klaus Busch. Wilhelm Knelangen." Euroscepticism : Party Politics, National Identity and European Integration.(2004), .
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