Ainsworth, M. D. S., Bell, S. M. & Stanton, D. J. (1971) Individual differences in strange-situation behaviour of one-year-olds. In: The Origins of Human Social Relation. (Ed. Schaffer, H. R.). New York: Academic Press.
Bowlby, J. (1973) Attachment and Loss, Volume II, Separation, Anxiety and Anger.
London: Hogarth Press.
Bowlby, J. (1977) The making and breaking of affectional bonds. British Journal of Psychiatry, 130, 201–10.
Buglass, D., Clarke, J., Henderson, A. S. & Kreitman, N. (1977) A study of agoraphobic housewives. Psychological Medicine, 7, 73–86.
Costello, C. G. & Comrey, A. L. (1967) Scales for measuring depression and anxiety. The Journal of Psychology, 66, 303–13.
Errera, P. (1962) Some historical aspects of the concept, phobia. Psychiatric Quarterly, 36, 325–36.
Marks, I. (1969) Fears and Phobias.
Marks, I. & Mathews, A. (1979) Brief standard self-rating for phobic patients. Behaviour Research and Therapy, 17, 263–7.
Parker, G., Tupling, H. & Brown, L. B. (1979) A parental bonding instrument. British Journal of Medical Psychology, 52, 1–11.
Shaw, P. M. (1976) The nature of social phobia.
Terhune, W. B. (1949) The phobic syndrome. Archives of Neurology and Psychiatry, 62, 162–72.
Tucker, W. I. (1956) Diagnosis and treatment of the phobic reaction. American Journal of Psychiatry, 112, 825–30.
Webster, A. S. (1953) The development of phobias in married women. Psychological Monographs, 67, No. 367.