1. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington: Author.
2. , , , , , , & (1972). Classification and nomenclature. In & (Eds.), Suicide prevention in the 70s, (pp. 7–12) (DHEW Publication No. HSM 72-9054). Washington: Government Printing Office.
3. Assessment of suicidal intention: The Scale for Suicide Ideation.
4. , , & (1979). Cognitive therapy of depression. New York: Guilford Press.
5. Hopelessness and eventual suicide: a 10-year prospective study of patients hospitalized with suicidal ideation