References
- Bakermans-Kranenberg, M. J., van IJzendorn, M. H., & Juffer, F. (2003). Less is more: Meta-analyses of sensitivity and attachment interventions in early childhood. Psychological Bulletin, 129, 195–215. doi:10.1037/0033-2909.129.2.195
- Bowlby, J. (1982). Attachment and Loss: Vol. 1. Attachment. New York, NY: Basic Books. (Original work published in 1969)