Frydenberg, E. (2008). Adolescent Coping. Advances in theory, research and practice. London: Routledge, KAP. 1-11, 13. (254 sider)
Rogoff, B. (1990). Apprenticeship in thinking: Cognitive development in social context. New York: Oxford University Press. Kap. 1-6. (132 sider)
Smith, L. & Ulvund, S.E. (1999). Spedbarnsalderen. Oslo: Universitetsforlaget. Kap. 1,6, 8-11, 15 (213 sider)
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