APA (7th ed.) Zitazioa
(2004). OECD environmental strategy: 2004 review of progress. OECD.
Chicago Style (17th ed.) Zitazioa
OECD Environmental Strategy: 2004 Review of Progress. Paris, France: OECD, 2004.
MLA (9th ed.) Zitazioa
OECD Environmental Strategy: 2004 Review of Progress. OECD, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.