Brunkhorst, Hauke. "Constitutionalism and Democracy in the World Society." The Twilight of Constitutionalism?. : Oxford University Press, 2010-02-11. Oxford Scholarship Online. 2010-05-01. Date Accessed 19 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-9>.
Brunkhorst, H.(2010-02-11). Constitutionalism and Democracy in the World Society. In The Twilight of Constitutionalism?. : Oxford University Press. Retrieved 19 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-9.
Brunkhorst, Hauke. "Constitutionalism and Democracy in the World Society." In The Twilight of Constitutionalism?. : Oxford University Press, 2010-02-11. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-9.
Brunkhorst H. Constitutionalism and Democracy in the World Society. In: Dobner P, Loughlin M. The Twilight of Constitutionalism?. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-9. Accessed May 19, 2013.