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Εricson ,J. (1998). Wisdom and the Sences : The way of creativity. London: W.W.Norton<br />
Fukuyama,F. (1995). Trust: The social virtues and the creation of prosperity .New<br />
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Kegan, R. (1998). In over our heads. London : Harvard University Press<br />
Maslow, A. (1954). Motivation and Personality (3rd Ed.). New York: Harper Pups.<br />
Travis ,J.W. & Regina, S.R. (2004). The Wellness Workbook, How to Achieve Enduring<br />
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