Busch, K., & Knelangen, W. German Euroscepticism: Klaus Busch. Wilhelm Knelangen. Euroscepticism : party politics, national identity and European integration.(2004).
Chicago-viite (17. p.)Busch, Klaus, ja Wilhelm Knelangen. "German Euroscepticism: Klaus Busch. Wilhelm Knelangen." Euroscepticism : Party Politics, National Identity and European Integration.(2004) .
MLA-viite (8. p.)Busch, Klaus, ja Wilhelm Knelangen. "German Euroscepticism: Klaus Busch. Wilhelm Knelangen." Euroscepticism : Party Politics, National Identity and European Integration.(2004), .
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