American Psychological Association
American Psychological Assc.: Post Traumatic Stress Disorder
This American Psychological Association site offers information on the incidence of PTSD, its symptoms and causes, and the effectiveness of treatment options in restoring health and function.
Healthline Media
What Is Post Traumatic Stress Disorder?
Causes, symptoms, diagnosis, treatment, and complications of Post-traumatic Stress Disorder.(July 2009)