APA aipamena

a. (1994). World Resousces 1994 - 95: A guide to the global environment. New York: Oxford university Press.

Chicago Style aipamena

a. World Resousces 1994 - 95: A Guide to the Global Environment. New York: Oxford university Press, 1994.

MLA aipamena

a. World Resousces 1994 - 95: A Guide to the Global Environment. New York: Oxford university Press, 1994.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.