1. Abraham, K. (1979). Selected papers of Karl Abraham, M.D. New York: Brunner/Mazel.
2. American Psychiatric Association. (1952). Diagnostic and statistical manual of mental disorders (1st ed.) Washington, DC: Author.
3. American Psychiatric Association. (1968). Diagnostic and statistical manual of mental disorders (2nd ed.) Washington, DC: Author.
4. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders (3rd ed.) Washington, DC: Author.
5. American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd ed., rev.) Washington, DC: Author.