Harmsen, R., & Spiering, M. Euroscepticism and the evolution of european political debate: Robert Harmsen. Menno Spiering. Euroscepticism : party politics, national identity and European integration.(2004).
Chicago-referens (17:e uppl.)Harmsen, Robert, och Menno Spiering. "Euroscepticism and the Evolution of European Political Debate: Robert Harmsen. Menno Spiering." Euroscepticism : Party Politics, National Identity and European Integration.(2004) .
MLA-referens (8:e uppl.)Harmsen, Robert, och Menno Spiering. "Euroscepticism and the Evolution of European Political Debate: Robert Harmsen. Menno Spiering." Euroscepticism : Party Politics, National Identity and European Integration.(2004), .
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