Gerken, PhD, CTRS, CPRP, CDSS, M. D., Costello, PhD, P. and Mrkic, MS, L. (2013) “The prevalence of evidence-based practice by the Certified Therapeutic Recreation Specialist in the intervention planning process for client treatment”, American Journal of Recreation Therapy, 12(1), pp. 23–30. doi: 10.5055/ajrt.2013.0037.