1. Barnes, M. L., & Sternberg, R. J. (1989). Social intelligence and decoding of nonverbal cues. Intelligence, 13(3), 263–287.
2. Bass, B. M. (1990). Bass and Stogdill’s handbook of leadership. Free Press.
3. Bass, B. M., & Bass, R. (2009). The Bass handbook of leadership: Theory, research, and managerial applications. Free Press.
4. Birdwhistell, R. L. (1968). Communication. International Encyclopedia of the Social Sciences, 8, 24–29.
5. Blake, R. R., & Mounton, J. S. (1964). The managerial grid. Gulf Publishing Company.