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2. American Foundation for Suicide Prevention (2013). Depression and suicide prevention. http://www.afsp.org/index.cfm?fuseaction=home.viewPage&page_id=050CDCA2-C158-FBAC-16ACCE9DC8B7026C .
3. Beck, A. T., & Steer, R. A. (1988). Manual for the Beck Hopelessness Scale. San Antonio, TX: Psychological Corp.
4. Beck, A. T., Steer, R. A., & Brown, G. K. (1996). Manual for the BDI-II. San Antonio, TX: The Psychological Corporation.
5. Brown, G. K., Beck, A. T., Steer, R. A., & Grisham, J. R. (2000). Risk factors for suicide in psychiatric outpatients: A 20-year prospective study. Journal of Consulting and Clinical Psychology, 68, 371–377.