APA (7th ed.) Zitazioa

(1987). The new environmental age. Press syndicate of th universityu.

Chicago Style (17th ed.) Zitazioa

The New Environmental Age. New York: Press syndicate of th universityu, 1987.

MLA (9th ed.) Zitazioa

The New Environmental Age. Press syndicate of th universityu, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.