1. Allison, S. T., & Goethals, G. R. (2013). Heroic leadership: An influence taxonomy of 100 exceptional individuals. New York: Routledge.
2. Alvarez, R. (1968). Informal reactions to deviance in simulated work organizations: A laboratory experiment. American Sociological Review, 33, 895–912.
3. Barnard, C. I. (1938). The functions of the executive. Cambridge, MA: Harvard University Press.
4. Bass, B. M. (1985). Leadership and performance beyond expectations. New York: Free Press.
5. Bass, B. M., & Riggio, R. E. (2006). Transformational leadership (2nd ed.). Mahwah, NJ: Erlbaum.