1. Crawshaw, B., Stokes, D. and Seddon, G. (1980)Survey of Training Methodology for Teachers of Environmental Education in the Far East, report on behalf of UNESCO, Paris.
2. de Bono, E. (1967)The Five-Day Course in Thinking, Penguin, Harmondsworth, UK.
3. de Bono, E. (1970)Lateral Thinking: Creativity Step by Step, Harper and Row, New York.
4. de Bono, E. (1971)Lateral Thinking for Management; A Handbook of Creativity, McGraw-Hill, London.
5. Hawrylyshyn, B. (1975) Management Education — a Conceptual Framework. In: Taylor, B. and Lippitt, G. (eds.)Management Development and Training Handbook. McGraw-Hill, London.