Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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