World Resources Institute. (1994). World Resources: A Guide to the Global Environment (1994-95 ed.). Oxford University Press.
Cita Chicago (17th ed.)World Resources Institute. World Resources: A Guide to the Global Environment. 1994-95 ed. New York ; Oxford: Oxford University Press, 1994.
Cita MLA (9th ed.)World Resources Institute. World Resources: A Guide to the Global Environment. 1994-95 ed. Oxford University Press, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.