APA (7th ed.) Citation

World Resources Institute, United Nations Environment Programme, & United Nations Development Programme. (1990). World resources. Oxford University Press.

Chicago Style (17th ed.) Citation

World Resources Institute, United Nations Environment Programme, and United Nations Development Programme. World Resources. New York: Oxford University Press, 1990.

MLA (8th ed.) Citation

World Resources Institute, et al. World Resources. Oxford University Press, 1990.