Doing Research on the Effectiveness of Psychotherapy and Psychotherapy Training: A person-centered/experiential perspective / Forschung zur Effektivität von Psychotherapie und Psychotherapietraining: Eine Personzentrierte/Experienzielle Perspektive / Investigar sobre la eficacia de la psicoterapia y de la formación en psicoterapia: una perspectiva centrada en la persona/experiencial

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