Media type: E-Article Title: How would we know if psychotherapy were harmful? Contributor: Dimidjian, Sona; Hollon, Steven D. Published: American Psychological Association (APA), 2010 Published in: American Psychologist, 65 (2010) 1, Seite 21-33 Language: English DOI: 10.1037/a0017299 ISSN: 1935-990X; 0003-066X Origination: Footnote: