Kraut, Richard. "Further Reflections on the Ethical Objection." Against Absolute Goodness. : Oxford University Press, 2012-01-01. Oxford Scholarship Online. 2012-01-19. Date Accessed 18 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199844463.001.0001/acprof-9780199844463-chapter-15>.
Kraut, R.(2012-01-01). Further Reflections on the Ethical Objection. In Against Absolute Goodness. : Oxford University Press. Retrieved 18 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199844463.001.0001/acprof-9780199844463-chapter-15.
Kraut, Richard. "Further Reflections on the Ethical Objection." In Against Absolute Goodness. : Oxford University Press, 2012-01-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199844463.001.0001/acprof-9780199844463-chapter-15.
Kraut R. Further Reflections on the Ethical Objection. In: Kraut R. Against Absolute Goodness. Oxford University Press; 2012. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199844463.001.0001/acprof-9780199844463-chapter-15. Accessed June 18, 2013.