(1994). Valuing the environment: Proceedings of the first annual International Conference on Environmentally Sustainable Development held at the World Bank, Washington, D. C., September 30-October 1, 1993. Washington: The World Bank.
Παραπομπή Chicago StyleValuing the Environment: Proceedings of the First Annual International Conference On Environmentally Sustainable Development Held At the World Bank, Washington, D. C., September 30-October 1, 1993. Washington: The World Bank, 1994.
Παραπομπή MLAValuing the Environment: Proceedings of the First Annual International Conference On Environmentally Sustainable Development Held At the World Bank, Washington, D. C., September 30-October 1, 1993. Washington: The World Bank, 1994.
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