1. Learned helplessness in humans: Critique and reformulation;Abramson;Journal of Abnormal Psychology,1978
2. Social networks as the unit of intervention;Attneave,1976
3. Matching changes in preschool environments to desired changes in child behavior;Bailey;Journal of the Division for Early Childhood,1983
4. Life-span developmental psychology: Introduction to research methods;Baltes,1977
5. Bayley scales of infant development;Bayley,1969