Book Review: The Never Ending Quest: Dr. Clare W. Graves Explores Human Nature,by Clare W. Graves (with Christopher C. Cowan & Natasha Todorovic,Eds.). Santa Barbara,CA: ECLET Publishing,2005. 578 pp.,Index. ISBN 0-9724742-1-8

Beck, D. , & Cowen, C. (1996). Spiral dynamics: Mastering values, leadership, and change (developmental management). Cambridge, MA: Blackwell .

Bertalanffy, L. von (1968). General systems theory: Foundations, development, applications. New York: Braziller .

Gebser, J. (1949/1986). The ever present origin. (N. Barstad & A. Mickunas, Trans.). Athens, OH: Ohio University Press .

Gilligan, C. (1993). In a different voice: Psychological theory and women's development. Cambridge, MA: Harvard University Press .

Kegan, R. (1994). In over our heads: The mental demands of modern life. Cambridge, MA: Harvard University Press .

Kohlberg, L. (1981). Essays on moral development (vol. 1). San Francisco: Harper & Row .

Wilber, K. (1998). Integral psychology. Boston : Shambhala .