Friedman, W. «Toward a psychology of Peace: A Study in Global Psychosynthesis». In Readings in Psychosynthesis: Theory, Process and Practice, edited by J. Weiser and T, Yeoman. Toronto: Depatment of Applied Psychology/Ontario Institite for Studies in Education, 1985.

Grof, S., ed. Human Survival and Consciousness Evolution. Albany, New York: State University of New York Press, 1988.

Grosso, M. The Final Stage. Walpole, N.H.: Stillpoint, 1985.

Perry, J.W. The Heart of History: Individuality in Evolution. Albany, New York: State University of New York Press, 1987.

Russell, P. The Global Brain, Los Angeles: Jeremy P. Tarcher, 1983.

Teilhard de Chardin, P. The Phenomenon of Man. New York: Harper and Row, 1959.

Walsh, R. Staying Alive: The Psychology of Human Survival. Boulder, Colo.: Shambhala, 1984.

Wilber, K. Up from Eden: A Transpersonal View of Human Evolution, Garden City, New York: Doubleday/Anchor, 1981.