1. Allderidge, P. (1974). The late Richard Dadd. London: Tate Gallery.
2. Allderidge, P. (1993). Richard Dadd. Mujinkan, Japan: Reiko Koyanagi.
3. American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author.
4. Strindberg's illness
5. Bleuler, E. (1950). Dementia praecox or the group of schizophrenias (J. Zinkin, Trans.). New York: International Universities Press.