International Conference on Environmentally Sustainable Development (1st : 1993 : World Bank), Serageldin, A., & Steer, A. (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. World Bank.
Chicago-referens (17:e uppl.)International Conference on Environmentally Sustainable Development (1st : 1993 : World Bank), Andrew Serageldin, och Andrew Steer. 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, D.C: World Bank, 1994.
MLA-referens (9:e uppl.)International Conference on Environmentally Sustainable Development (1st : 1993 : World Bank), et al. 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. World Bank, 1994.