1. Coomer, J. Quest for a sustainable society. Pergamon, Oxford. 1979.
2. Redclift, M. Sustainable development: Exploring the contradictions.Methuen, London. 1987.
3. Sustainable development: Constraints and opportunities;Tolba;Butterworth, London.,1987
4. Wced. Our common future. Oxford University Press, Oxford. 1987.