1. Bjork, D. W. (1997). B. F. Skinner: A life. Washington, DC: APA Books.
2. Erikson, E. H. (1958). Young man Luther: A study in psychoanalysis and history. New York: W. W. Norton.
3. Erikson, E. H. (1969). Gandhi’s truth: On the origins of militant non-violence. New York: W. W. Norton.
4. Freud, S. (1910). Leonardo da Vinci and a memory of his childhood. Standard Edition of the Complete Psychological Work of Sigmund Freud, 11, 59–137.
5. Freud, S. (1939). Moses and monotheism. London: The Hogarth Press.