Appelbaum, Stephen A. “Questioning the Questions: Effectiveness of Psychotherapy”. Revista Interamericana de Psicología/Interamerican Journal of Psychology 9, no. 1 & 2 (July 20, 2017). Accessed April 5, 2026. http://sip2013.sipsych.org/ojs-/index.php/IJP/article/view/739.