APA (7th ed.) Citation

The World Resources Institute, The United Nations Environment Programme, & The United Nations Development Programme. (1990). World Resources 1990-91. A report by the World Resources Institute in collaboration with UNEPand UNDP. Oxford University Press.

Chicago Style (17th ed.) Citation

The World Resources Institute, The United Nations Environment Programme, and The United Nations Development Programme. World Resources 1990-91. A Report by the World Resources Institute in Collaboration with UNEPand UNDP. New York, New York: Oxford University Press, 1990.

MLA (9th ed.) Citation

The World Resources Institute, et al. World Resources 1990-91. A Report by the World Resources Institute in Collaboration with UNEPand UNDP. Oxford University Press, 1990.