1. Ainsworth, M. D., and Bell, S. M. (1969). Some contemporary patterns of mother-infant interactions in the feeding situation. In Ambrose, A. (ed.),Stimulation in Early Infancy, Academic Press, London.
2. Apgar, V. (1953). A proposal for a new method of evaluation of the newborn infant.Curr. Res. Anaesth. Anal. 32: 260?267.
3. Bower, T. G. R. (1977).A Primer of Infant Development, W. H. Freeman, San Francisco.
4. Brazelton, T. B. (1956). Sucking in infancy.Paediatrics 17: 400?404.
5. Brody, S. (1956).Patterns of Mothering, International Universities Press, New York.