APA (7th ed.) Zitazioa

Palmer. Ecospeak. Southern Illinois University Press.

Chicago Style (17th ed.) Zitazioa

Palmer. Ecospeak. Southern Illinois University Press.

MLA (9th ed.) Zitazioa

Palmer. Ecospeak. Southern Illinois University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.