http://www.nimh.nih.gov/healthinformation/anxietymenu.cfm

http://en.wikipedia.org/wiki/Anxiety_disorder

http://www.adaa.org/

http://www.medicinenet.com/anxiety/article.htm

http://www.webmd.com/anxiety-panic/

http://www.helpguide.org/mental/anxiety_types_symptoms_treatment.htm

http://www.nimh.nih.gov/health/publications/anxiety-disorders/complete-publication.shtml

http://www.pueblo.gsa.gov/cic_text/health/anxiety/anxiety.htm

http://www.webmd.com/anxiety-panic/guide/mental-health-anxiety-disorders

http://www.anxietytribe.com/