Defending Poetry: Art and Ethics in Joseph Brodsky, Seamus Heaney, and Geoffrey Hill. : Oxford University Press, 2010-09-15. Oxford Scholarship Online. 2011-05-01. Date Accessed 18 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199583546.001.0001/acprof-9780199583546>.
(2010-09-15). Defending Poetry: Art and Ethics in Joseph Brodsky, Seamus Heaney, and Geoffrey Hill. : Oxford University Press. Retrieved 18 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199583546.001.0001/acprof-9780199583546.
Defending Poetry: Art and Ethics in Joseph Brodsky, Seamus Heaney, and Geoffrey Hill. : Oxford University Press, 2010-09-15. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199583546.001.0001/acprof-9780199583546.
Williams D. Defending Poetry: Art and Ethics in Joseph Brodsky, Seamus Heaney, and Geoffrey Hill. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199583546.001.0001/acprof-9780199583546. Accessed May 18, 2013.