↑Ledentallen. In: Documentatiecentrum Nederlandse Politieke Partijen.Rijksuniversiteit Groningen, 23. Februar 2023, abgerufen am 25. Februar 2023 (niederländisch).
↑Rudy Andeweg, Galen A. Irwin: Politics and Governance in the Netherlands. Palgrave Macmillan, Basingstoke, 2. Aufl. 2002, ISBN 0-333-96156-0, S. 49.
↑Jochen Clasen, Daniel Clegg: Regulating the Risk of Unemployment: National Adaptations to Post-Industrial Labour Markets in Europe. Oxford University Press, 2011, ISBN 978-0-19-959229-6, S.76 (books.google.com).
↑David Broughton: Changing Party Systems in Western Europe. Continuum International Publishing Group, 1999, ISBN 978-1-85567-328-1, S.178 (books.google.com).
↑Thomas Poguntke, Paul Webb: The Presidentialization of Politics: A Comparative Study of Modern Democracies. Oxford University Press, 2007, ISBN 978-0-19-921849-3, S.158 (books.google.com).
↑Anne Marije van Essen, Paul Pennings: Balancing Competing Goals. Exploring the political controversy on new hospital payment systems in Germany, the Netherlands and the UK. In: Zeitschrift für Vergleichende Politikwissenschaft. Band 3, Nr. 1, 2009, S. 71.