Wright, Richard W. "The Nightmare and the Noble Dream: Hart and Honoré on Causation and Responsibility." The Legacy of H.L.A. Hart: Legal, Political, and Moral Philosophy. : Oxford University Press, 2008-07-31. Oxford Scholarship Online. 2009-01-01. Date Accessed 23 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199542895.001.0001/acprof-9780199542895-chapter-9>.
Wright, R.(2008-07-31). The Nightmare and the Noble Dream: Hart and Honoré on Causation and Responsibility. In The Legacy of H.L.A. Hart: Legal, Political, and Moral Philosophy. : Oxford University Press. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199542895.001.0001/acprof-9780199542895-chapter-9.
Wright, Richard W. "The Nightmare and the Noble Dream: Hart and Honoré on Causation and Responsibility." In The Legacy of H.L.A. Hart: Legal, Political, and Moral Philosophy. : Oxford University Press, 2008-07-31. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199542895.001.0001/acprof-9780199542895-chapter-9.
Wright RW. The Nightmare and the Noble Dream: Hart and Honoré on Causation and Responsibility. In: Kramer MH, Grant C, Colburn B, Hatzistavrou A. The Legacy of H.L.A. Hart: Legal, Political, and Moral Philosophy. Oxford University Press; 2008. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199542895.001.0001/acprof-9780199542895-chapter-9. Accessed May 23, 2013.