Olsen, J. P. (2007). Europe in search of political order: An institutional perspective on unity/diversity, citizens/their helpers, democratic design/historical drift and the co-existence of orders. Oxford University Press.

Olsen, Johan P. Europe in Search of Political Order: An Institutional Perspective on Unity/diversity, Citizens/their Helpers, Democratic Design/historical Drift and the Co-existence of Orders. Oxford ; New York: Oxford University Press, 2007.

Olsen, Johan P. Europe in Search of Political Order: An Institutional Perspective on Unity/diversity, Citizens/their Helpers, Democratic Design/historical Drift and the Co-existence of Orders. Oxford University Press, 2007.