Bartels, Larry M. "The Impact of Candidate Traits in American Presidential Elections." Leaders' Personalities and the Outcomes of Democratic Elections. : Oxford University Press, 2002-03-21. Oxford Scholarship Online. 2003-11-01. Date Accessed 20 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-2>.
Bartels, L.(2002-03-21). The Impact of Candidate Traits in American Presidential Elections. In Leaders' Personalities and the Outcomes of Democratic Elections. : Oxford University Press. Retrieved 20 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-2.
Bartels, Larry M. "The Impact of Candidate Traits in American Presidential Elections." In Leaders' Personalities and the Outcomes of Democratic Elections. : Oxford University Press, 2002-03-21. http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-2.
Bartels LM. The Impact of Candidate Traits in American Presidential Elections. In: King A. Leaders' Personalities and the Outcomes of Democratic Elections. Oxford University Press; 2002. http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-2. Accessed May 20, 2013.