Brettschneider, Frank, and Oscar W. Gabriel. "The Nonpersonalization of Voting Behavior in Germany." Leaders' Personalities and the Outcomes of Democratic Elections. : Oxford University Press, 2002-03-21. Oxford Scholarship Online. 2003-11-01. Date Accessed 19 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-5>.
Brettschneider, F., & Gabriel, O.(2002-03-21). The Nonpersonalization of Voting Behavior in Germany. In Leaders' Personalities and the Outcomes of Democratic Elections. : Oxford University Press. Retrieved 19 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0199253137.001.0001/acprof-9780199253135-chapter-5.
Brettschneider, Frank, and Oscar W. Gabriel. "The Nonpersonalization of Voting Behavior in Germany." 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-5.
Brettschneider F, Gabriel OW. The Nonpersonalization of Voting Behavior in Germany. 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-5. Accessed May 19, 2013.