1. & (1978). Patterns of attachment: A psychological study of the Strange Situation. Hillsdale, NJ: Erlbaum.
2. American Psychiatric Association. (1994). Diagnostic and statistical manual of mental disorders, 4th ed. Washington, DC: Author.
3. (1955). La carence de soins maternels: Les effets de la separation et la privation de soins maternels sur le developpement des jeunes enfants [Failure of maternal care: The effects of separation and deprivation of maternal care on the development of young children]. Paris: Presses Universitaires de France.
4. (1969/1982). Attachment and loss: Attachment. New York: Basic Books.