1. Albert, M., Hurrelmann, K., & Quenzel, G. (2010). 16. Shell Jugendstudie—Jugend 2010. Retrieved from Die Shell Jugendstudie 2015 website: http://www.shell.de/home/content/deu/aboutshell/our_commitment/shell_youth_study/downloads/ (accessed 22 April 2013)
2. Anderson, B. (2006). Imagined communities: Reflections on the origin and spread of nationalism. London: Verso Books.
3. Arts, W., & Halman, L. (2006). National identity in Europe today: What the people feel and think. International Journal of Sociology, 35(4), 69–93. doi: 10.2753/IJS0020-7659350404 .
4. Barrett, M., Flood, C., & Eade, J. (Eds.) (2011). Nationalism, ethnicity, citizenship: Multidisciplinary perspectives. Newcastle: Cambridge Scholars Publishing.
5. Baumeister, R. F. (1986). Public self and private self. New York: Springer.