1. Ainsworth, M. D. S., Blehar, M. C., Waters, E. & Wall, S. (1978). Patterns of attachment: Assessed in the strange situation and at home. Hillsdale, NJ: Lawrence Erlbaum.
2. Barnard, K., Morisset, C. & Spieker, S. (1993). Preventive interventions: Enhancing parent-infant relationships. In Charles Zeanah (Ed.), Handbook of infant mental health. New York: Guilford.
3. Bayley, N. (1993). Bayley Scales of Infant Development (2nded.). San Antonio, TX: Psychological Corporation.
4. A procedural theory of therapeutic action: Commentary on the symposium,Interventions that effect change in psychotherapy
5. Bion, W. R. (1974). Experience in groups. London: Tavistock.