Clark, David M; Ehlers, A; Hackmann, A; McManus, F; Fennell, M; Grey, N; Waddington, L; Wild, J (junho de 2006). «Cognitive therapy versus exposure and applied relaxation in social phobia: A randomized controlled trial». Journal of Consulting and Clinical Psychology. 74 (3): 568–578. PMID16822113. doi:10.1037/0022-006X.74.3.568|acessodata= requer |url= (ajuda)
Clark, David M; Ehlers, A; Hackmann, A; McManus, F; Fennell, M; Grey, N; Waddington, L; Wild, J (junho de 2006). «Cognitive therapy versus exposure and applied relaxation in social phobia: A randomized controlled trial». Journal of Consulting and Clinical Psychology. 74 (3): 568–578. PMID16822113. doi:10.1037/0022-006X.74.3.568|acessodata= requer |url= (ajuda)