1. Department of Health. (2008). Improving access to psychological therapies (IAPT) commissioning toolkit. Department of Health. Retrieved from http://www.iapt.nhs.uk
2. The depression report: A new deal for depression and anxiety disorders;R. Layard,2006
3. Cost-benefit analysis of psychological therapy;R. Layard;National Institute Economic Review,2007
4. Influence of initial severity of depression on effectiveness of low intensity interventions: meta-analysis of individual patient data;P. Bower;Bmj,2013
5. National Institute for Health and Clinical Excellence (NICE) (2011)common mental health disorders identification and pathways to care retrieved from https://www.nice.org.uk/guidance/cg123