1. Ainsworth, M.D.S., Blehar, M.C., Waters, E., & Wall, S. (1978). Patterns of attachment. Hillsdale, NJ: Lawrence Erlbaum.
2. Asay, T.P., & Lambert, M.J. (1999). The empirical case for the common factors in therapy. In M.A. Hubble, B.L. Duncan en S.D. Miller (Eds.), The heart and soul of change. What works in therapy? (pp. 23-55). Washington: American Psychological Association.
3. Bowlby, J. (1969). Attachment and loss, Vol. 1. New York: Basic Books.
4. Damasio, A. (1999). The feeling of what happens. Body and emotion in the making of consciousness. Londen: William Heineman.
5. Dozier, M., & Tyrrell, C. (1998). The role of attachment in therapeutic relationships. In A. Simpson en W.S. Rholes (Eds.), Attachment theory and close relationships (pp. 221-248). New York/Londen: The Guilford Press.