119- Freedman، D. G. "1960": The infant's fear of strangers and the flight response. J. of Child Psychology and Psychiatry، 4، 242-248.
120- Freud، S. "1950": The ego and th id. London: Hogarth. Press.
121- Freud، S. "1959": Collected Papers. Vol. I، II، III. IV. New York; Books.
122- Fry، P. S. "1977"; Success، Failme، and resistance to temptation. Developmental Psychology، 13،519- 520.
123- Furth، H. C "1970"; On language and Knowing in Piaget's developmental theory. Human Development، 13، 241- 257.
124- Gall، S.، Beins، B.. & Feldman، A. J. "1996"; The Gale encyclopedia of Psychology. New York; Robyn v. young، coordinating Editor.
125- Gelman، R. "1969": Conservation acquisition: A Probem of learning to attend to relevant attributes. J. of Experimental child Psychology، 7، 167- 187.
126- Gelman، R. & Au، Tk. "1996"; Perceptual and cognitive development، 2nd ed.، San Diego: Academic Press.
127- Gewirtz، J. L. "1969"; Mechanisms of social leaning: some roles of stimulation and behavior in early human development. "In" D. Goslin "Ed."، Handbook of Socialization theory and research. Chicago. Rand Mc Nally.
128- Goldstein، D. "1972": Cognitive Performance and competence characteristics of lower- and middle- class preschool children. J. of Genetic Psychology، 132، 177- 183.
129- Goodnow، J. J. "1969"; Problems in research in culture and thought. "In"، D. Elkind & J. Flavell "Eds."; Studies in cognitive development: Essays in honor an Jean Piaget. New York: Oxford university Press، 1969.
130- Gorman، A. "1980"; Developmental Psychology. New York: D. Van Nostard Co.