APA (7th ed.) Citation

Marker, C. D., & Aylward, A. G. (2012). Generalized anxiety disorder. Hogrefe.

Chicago Style (17th ed.) Citation

Marker, Craig D., and Alison G. Aylward. Generalized Anxiety Disorder. Toronto: Hogrefe, 2012.

MLA (9th ed.) Citation

Marker, Craig D., and Alison G. Aylward. Generalized Anxiety Disorder. Hogrefe, 2012.