1. Child maltreatment and insecure attachment: A meta-analysis;Baer;Journal of Reproductive and Infant Psychology,2006
2. Childhood trauma questionnaire: A retrospective self-report manual;Bernstein,1998
3. Separation;Bowlby,1973
4. Loss, sadness and depression;Bowlby,1980
5. Attachment;Bowlby,1982