Pehrson, L., Oxelheim, L., & Gustavsson, S. (2009). How Unified Is the European Union?: European Integration Between Visions and Popular Legitimacy. Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-95855-0

Pehrson, Lars, Lars Oxelheim, and Sverker Gustavsson. How Unified Is the European Union?: European Integration Between Visions and Popular Legitimacy. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. https://doi.org/10.1007/978-3-540-95855-0.

Pehrson, Lars, et al. How Unified Is the European Union?: European Integration Between Visions and Popular Legitimacy. Springer Berlin Heidelberg, 2009. https://doi.org/10.1007/978-3-540-95855-0.