1. Diagnostic and statistical manual of mental disorders,1980
2. Diagnostic and statistical manual of mental disorders,1987
3. The nature of anxiety: Anxiety, depression, and emotional disorders;Barlow,1991
4. Anxiety and its disorders: The nature and treatment of anxiety and panic;Barlow,1988
5. Generalized anxiety and generalized anxiety disorder: Description and reconceptualization;Barlow;American Journal of Psychiatry,1986