1. Abram, D. (1996). Spell of the sensuous. New York, NY: Vintage Books.
2. Berget, B., & Grepperud, S. (2011). Animal-assisted interventions for psychiatric patients: Beliefs in treatment effects among practitioners. European Journal of Integrative Medicine, 3(2), e91–e96.
3. Brill, A. A. (1921). Basic principles of psychoanalysis. New York, NY: University Press of America.
4. Cohen, M. (1997). Reconnecting with nature: Finding wellness through rebuilding your bond with earth (2nd ed.). Friday Harbour, WA: Ecopress.
5. DeMello, M. (2012). Animals and society: An introduction to human-animal studies. New York, NY: Columbia University Press.