Gothard, Katalin M., and Kari L. Hoffman. "Circuits of Emotion in the Primate Brain." Primate Neuroethology. : Oxford University Press, 2010-01-01. Oxford Scholarship Online. 2010-02-01. Date Accessed 18 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195326598.001.0001/acprof-9780195326598-chapter-16>.
Gothard, K., & Hoffman, K.(2010-01-01). Circuits of Emotion in the Primate Brain. In Primate Neuroethology. : Oxford University Press. Retrieved 18 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195326598.001.0001/acprof-9780195326598-chapter-16.
Gothard, Katalin M., and Kari L. Hoffman. "Circuits of Emotion in the Primate Brain." In Primate Neuroethology. : Oxford University Press, 2010-01-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195326598.001.0001/acprof-9780195326598-chapter-16.
Gothard KM, Hoffman KL. Circuits of Emotion in the Primate Brain. In: Platt M, Ghazanfar A. Primate Neuroethology. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195326598.001.0001/acprof-9780195326598-chapter-16. Accessed May 18, 2013.