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Erikson, E. "The Eight Stages of Man" in CHILDHOOD AND SOCIETY, New York: Norton, 1963

Getzels, J. and Jackson, P.W. CREATIVITY AND INTELLIGENCE New York: Wiley, 1962

Gowan, J.C. DEVELOPMENT OF THE CREATIVE INDIVIDUAL San Diego : Knapp, 1972

Harrow , A. J. A TAXONOMY OF THE PSYCHOMOTOR DOMAIN, New York: McKay, 1972

Kohlberg, L. and Mayer, R. "Development as the aura of Education" HARVARD EDUCATIONAL REVIEW. 42:449-496, Nov. 1972

Krathwohl, D.R. and others , TAXONOMY OF EDUCATIONAL OBJECTIVES: AFFECTIVE DOMAIN. New York: McKay, 1964

Perry W.G. Jr. FORMS OF ETHICAL AND INTELLECTUAL DEVELOPMENT IN THE COLLEGE YEARS . New York: Holt, Rinehart & Winston, 1970

Simpson, E.J. THE CLASSIFICATION OF EDUCATIONAL OBJECTIVES PSYCHOMOTOR DOMAIN. Urbana: University of Illinois, 1966

Simpson, Julia , "A Comparison of Cognitive, Affective and other Developmental Stages " Ed. M. thesis, California State University, Northridge, 1975.