1. Grollman , Earl A. 1976.Talking About Death: A Dialogue Between Parent and Child, 31Boston: Beacon Press.
2. Feifel , Herman. 1977.New Meanings of Death, 48New York: McGraw-Hill.
3. Vogel , Linda Jane . 1975.Helping a Child Understand Death, 16Philadelphia: Fortress Press.
4. Grollman . 28 op. cit.