Lifton, R, J., and Mitchell, G., (2002) Who Owns Death? Capital Punishment, the American Conscience, and the End of Executions, Harper Perennial, 200- 250.
Mandery, E, J., (2011) Capital Punishment: A Balanced Examination, Jones & Bartlett Learning, 2 edition, 550- 578.
McCord, D., and Latzer, B., (2010) Death Penalty Cases, Leading U.S. Supreme Court Cases on Capital Punishment, Butterworth-Heinemann; 3 edition, 400- 410.
Messerli, J., (2007) "Should The Death Penalty Be Banned as a Form of Punishment " Balanced Politics . 1.