Reference:

Rachman, S. (2013). Anxiety / (3rd ed.). Routledge.

Anxiety and Depression Association of America (2020): https://adaa.org/about-adaa/press-room/facts-statistics

Barlow, D. H., Raffa, S. D., & Cohen, E. M. (2002). Psychosocial treatments for panic disorders, phobias, and generalized anxiety disorder.

Stein, M. B., & Stein, D. J. (2008). Social anxiety disorder. The lancet, 371(9618), 1115-1125.

Wittchen, H. U., & Fehm, L. (2003). Epidemiology and natural course of social fears and social phobia. Acta Psychiatrica Scandinavica, 108, 4-18.