Journal article
Evidence that therapy works in clinically representative conditions
WR Shadish, GE Matt, AM Navarro, G Siegle, P CritsChristoph, MD Hazelrigg, AF Jorm, LC Lyons, MT Nietzel, HT Prout, L Robinson, ML Smith, M Svartberg, B Weiss
JOURNAL OF CONSULTING AND CLINICAL PSYCHOLOGY | AMER PSYCHOLOGICAL ASSOC | Published : 1997