Cita APA (7a ed.)

World Resources Institute & United Nations Environment Programme. (1986). World resources. World Resources Institute.

Cita Chicago Style (17a ed.)

World Resources Institute y United Nations Environment Programme. World Resources. Washington, D.C.: World Resources Institute, 1986.

Cita MLA (9a ed.)

World Resources Institute y United Nations Environment Programme. World Resources. World Resources Institute, 1986.

Precaución: Estas citas no son 100% exactas.