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(2000-03-09). A Debate Over Rights: Philosophical Enquiries. : Oxford University Press. Retrieved 25 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198298991.001.0001/acprof-9780198298991.
A Debate Over Rights: Philosophical Enquiries. : Oxford University Press, 2000-03-09. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198298991.001.0001/acprof-9780198298991.
H. Kramer M, N.E. S, Hillel S. A Debate Over Rights: Philosophical Enquiries. Oxford University Press; 2000. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198298991.001.0001/acprof-9780198298991. Accessed May 25, 2013.