Horty, John F. "Strategic Oughts." Agency and Deontic Logic. : Oxford University Press, 2001-02-08. Oxford Scholarship Online. 2003-11-01. Date Accessed 26 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0195134613.001.0001/acprof-9780195134612-chapter-7>.
Horty, J.(2001-02-08). Strategic Oughts. In Agency and Deontic Logic. : Oxford University Press. Retrieved 26 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0195134613.001.0001/acprof-9780195134612-chapter-7.
Horty, John F. "Strategic Oughts." In Agency and Deontic Logic. : Oxford University Press, 2001-02-08. http://www.oxfordscholarship.com/view/10.1093/0195134613.001.0001/acprof-9780195134612-chapter-7.
Horty JF. Strategic Oughts. In: Horty JF. Agency and Deontic Logic. Oxford University Press; 2001. http://www.oxfordscholarship.com/view/10.1093/0195134613.001.0001/acprof-9780195134612-chapter-7. Accessed May 26, 2013.