1. Patterns of attachment: A psychological study of the strange situation;Ainsworth;Lawrence Erlbaum,1978
2. Attachment styles among young adults: A test of a four-category model;Bartholomew;Journal of Personality and Social Psychology,1991
3. Attachment and loss: Vol. 1. Attachment;Bowlby,1969
4. Attachment and loss: Vol. 2. Separation: Anxiety and anger;Bowlby,1973
5. Attachment and loss: Vol. 3. Loss;Bowlby,1980