1. Barnlund, D. C, & Haiman, F. S. (1959). The dynamics of discussion. Boston: Houghton- Mifflin.
2. Brookfield, S. D., & Preskill, S. (1999). Discussion as a* way of teaching: Tools and techniques for democratic classrooms. San Francisco: Jossey-Bass.
3. Christensen, C. R., Garvin, D. A., & Sweet, A. (Eds.). (1991). Education for judgment: The artistry of discussion leadership. Boston: Harvard Business School.
4. Cronin, M. W., & Grice, G. L. (1993). A comparative analysis of training models versus consulting/training models for implementing oral communication across the curricu- lum. Communication Education, 42, 1–9.
5. Cronin, M. W., Grice, G. L., & Palmerton, P. R. (2000). Oral communication across the curriculum: The state of the art after twenty-five years of experience. Journal of the Association of Communication Administration, 29, 66–87.