1. Cohen, Carl. 1971.Democracy, 41Univ. of Georgia Press: Athens.
2. Taylor, Paul. 1993.International Organization in the Modern World: The Regional and the Global Process, 36London and New York: Pinter Publishers.
3. National identity and the idea of European unity
4. Dahrendorf, Ralf. 1967.Society and Democracy in Germany, 267London: Weidenfeld.