Batson, C. Daniel. "Antecedents of Empathic Concern." Altruism in Humans. : Oxford University Press, 2010-12-31. Oxford Scholarship Online. 2011-05-01. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195341065.001.0001/acprof-9780195341065-chapter-3>.
Batson, C.(2010-12-31). Antecedents of Empathic Concern. In Altruism in Humans. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195341065.001.0001/acprof-9780195341065-chapter-3.
Batson, C. Daniel. "Antecedents of Empathic Concern." In Altruism in Humans. : Oxford University Press, 2010-12-31. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195341065.001.0001/acprof-9780195341065-chapter-3.
Batson CD. Antecedents of Empathic Concern. In: Batson CD. Altruism in Humans. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195341065.001.0001/acprof-9780195341065-chapter-3. Accessed June 19, 2013.