Gaya APA

Essau, C, A., Petermann, F. (2001). Anxiety disorders in children and adolescents : epidemology, risk factors and tretment . New York: Taylor and Francis.

Gaya MLA

Essau, Cecelia, A.., Petermann, Franz. "Anxiety disorders in children and adolescents : epidemology, risk factors and tretment". New York: Taylor and Francis, 2001. Text.