O'Sullivan, Mary. "Introduction." Contests for Corporate Control: Corporate Governance and Economic Performance in the United States and Germany. : Oxford University Press, 2001-06-28. Oxford Scholarship Online. 2003-11-01. Date Accessed 22 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/0199244863.001.0001/acprof-9780199244867-chapter-1>.
O'Sullivan, M.(2001-06-28). Introduction. In Contests for Corporate Control: Corporate Governance and Economic Performance in the United States and Germany. : Oxford University Press. Retrieved 22 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/0199244863.001.0001/acprof-9780199244867-chapter-1.
O'Sullivan, Mary. "Introduction." In Contests for Corporate Control: Corporate Governance and Economic Performance in the United States and Germany. : Oxford University Press, 2001-06-28. http://www.oxfordscholarship.com/view/10.1093/0199244863.001.0001/acprof-9780199244867-chapter-1.
O'Sullivan M. Introduction. In: O'Sullivan M. Contests for Corporate Control: Corporate Governance and Economic Performance in the United States and Germany. Oxford University Press; 2001. http://www.oxfordscholarship.com/view/10.1093/0199244863.001.0001/acprof-9780199244867-chapter-1. Accessed May 22, 2013.