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2. American Art Therapy Association [AATA] (2017). American Art Therapy Association. Retrieved 4 April, 2017, from http://www.arttherapy.org/upload/aatafactsheet.pdf.
3. A step toward empirical evidence: Operationalizing and uncovering drama therapy change processes;Armstrong;The Arts in Psychotherapy,2016
4. What do you see?: Phenomenology of therapeutic art expression;Betensky,1995
5. A history of art therapy in the United States;Borowsky Junge,1994