Walker, Neil. "Beyond the Holistic Constitution?." The Twilight of Constitutionalism?. : Oxford University Press, 2010-02-11. Oxford Scholarship Online. 2010-05-01. Date Accessed 20 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-14>.
Walker, N.(2010-02-11). Beyond the Holistic Constitution?. In The Twilight of Constitutionalism?. : Oxford University Press. Retrieved 20 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199585007.001.0001/acprof-9780199585007-chapter-14.
Walker, Neil. "Beyond the Holistic Constitution?." 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-14.
Walker N. Beyond the Holistic Constitution?. 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-14. Accessed May 20, 2013.