Weiss, Jay M., Melissa K. Demetrikopoulos, Paige M. Mccurdy, Charles H. K. West, and Robert W. Bonsall. "Depression Seen Through an Animal Model: An Expanded Hypothesis of Pathophysiology and Improved Models." Anxiety, Depression, and Emotion. : Oxford University Press, 2000-08-24. Oxford Scholarship Online. 2012-03-22. Date Accessed 18 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195133585.001.0001/acprof-9780195133585-chapter-1>.
Weiss, J., Demetrikopoulos, M., Mccurdy, P., West, C., & Bonsall, R.(2000-08-24). Depression Seen Through an Animal Model: An Expanded Hypothesis of Pathophysiology and Improved Models. In Anxiety, Depression, and Emotion. : Oxford University Press. Retrieved 18 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195133585.001.0001/acprof-9780195133585-chapter-1.
Weiss, Jay M., Melissa K. Demetrikopoulos, Paige M. Mccurdy, Charles H. K. West, and Robert W. Bonsall. "Depression Seen Through an Animal Model: An Expanded Hypothesis of Pathophysiology and Improved Models." In Anxiety, Depression, and Emotion. : Oxford University Press, 2000-08-24. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195133585.001.0001/acprof-9780195133585-chapter-1.
Weiss JM, Demetrikopoulos MK, Mccurdy PM, West CHK, Bonsall RW. Depression Seen Through an Animal Model: An Expanded Hypothesis of Pathophysiology and Improved Models. In: Davidson RJ. Anxiety, Depression, and Emotion. Oxford University Press; 2000. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195133585.001.0001/acprof-9780195133585-chapter-1. Accessed May 18, 2013.