1. Boyatzis, R. E. (1982). The competent manager: A model for effective performance. New York: Wiley.
2. Boyatzis, R. E. (1998). Transforming qualitative information: Thematic analysis and code development. Thousand Oaks: Sage.
3. Goleman, D. (1998). Working with emotional intelligence. New York: Bantam.
4. McClelland, D. C. (1951). Personality. New York: William Sloane Associates.
5. McClelland, D. C. (1961). The achieving society. New York: Van Nostrand.