Barrett, K.C., & Campos, J.J. ( 1987). Perspectives on emotional development: II. A functionalist approach to emotions. In J. Osofsky (Ed.), Handbook of infant development (2nd ed., pp. 555-578). New York: Wiley.
2.
Bridges, K.M.B. ( 1932). Emotional development in early infancy. Child Development, 3, 324-341.
3.
Holodynski, M., & Friedlmeier, W. (2006). Development of emotions and emotion regulation. New York: Springer.
4.
Izard, C.E. ( 1991). The psychology of emotions. New York : Plenum Press.
5.
Sroufe, L.A. ( 1996). Emotional development. New York: Cambridge University Press.
6.
Vygotsky, L.S. ( 1987). Thinking and speech. In R. W. Rieber & A. S. Carton (Eds.), (N. Minick, Trans.), The collected works of L. S. Vygotsky. New York: Plenum Press. (Original work published 1934)