References
- Anderson, V. and Johnson, L. (1997) ‘Systems thinking basics, from concepts to causal loops’ Waltham: Pegasus communications. ISBN 1-883823-12-9.
- Capra, F. (1996). The web of life. New York: Anchor Books. ISBN13 978-0385476768.
- Senge, P. M. (1990) ‘The Fifth Discipline’ New York: Doubleday. ISBN13 978-1905211203.