Reference: Everyone double checks things sometimes
When Unwanted Thoughts Take Over: Obsessive-Compulsive Disorder. [Internet]. Bethesda, MD: National Institute of Mental Health (NIMH), National Institutes of Health (NIH), U.S. Department of Health and Human Services; 2009 [cited 2019 May 9]. 3 p.*
*Citation note. The citation show is as provided by the source.