235- Siegel، A.W. & White، S. H.; The development of Spatial representations of large-scale environments، "in": H.W. Reese "Ed.". Advances in child development and behavior، vol. 10. New York: Academic Press. 1989.
236- Siglor، R.S.; Children's thinking "2nd ed.". Englewook cliffs.، N.J.: prentice Hall.
237- Singer، J.; The Child's world of make-believe. New York: Academic، Press، 1989.
238- Sommer، B. B.، Puberty and adolescence، New York: OxFord univesity press، 1990.
239- Sokolov، Y.N.; Perception and conditioned reflex. New York: Pergamon Press، 1983.
240- Sperry، R.W.; Left-brain، right-brain. Saturday Review، 1975، 30- 33.
241- ----------، Mechanisms of neural maturation "in": S.S. Stevens "Ed."; Handbook of experimental Psychology. New York: wiley، 1971،236-258.
242- Spitz، R.; The first year of life. New York: International university Press، 1965.
243- Sroufe، L.A.; Wariness of Strangers and the study of infant development. Child Development، 1977، 48، 731-746.
244- Staub، E.; Cultural-Societal roots of violence. American Psychologist، 1996، 51، 117-132.
245- Stewart، A. & Koch، J.: Children development through adolescent. New York: John wiley. INC، 1983.
246- Sugarman، B.; The school and moral development. London: Groon Helm LTD، 1973.
247- Tanner، J.M.; Physical grwoth. "in": P.H. Mussen "Ed.": Carmichael's manual of child Psychology، New York: Wiley، 1970.
248- Tronick، E.Z.; Emotions and emotional communication in infants American Psychologists، 1989، 44، 112-119.
249- Turiel، E.; Developmental Processes in the child's moral