to enter the next stage. See also Child development Developmental psychology Ethnic identity development Kohlberg's stages of moral development Neo-Freudianism Positive disintegration References Sources Publications Erikson, E. (1950). Childhood and society (1st ed.). New York: Norton Erikson, Erik H. (1959) Identity and the Life Cycle. New York: International Universities Press. Erikson, Erik H. (1968) Identity, Youth and Crisis. New York: Norton. Sheehy, Gail (1976) Passages: Predictable Crises of Adult Life. New York: E. P. Dutton. Stevens, Richard (1983) Erik Erikson: An Introduction. New York: St. Martin's. Developmental stage theories Psychoanalysis