APA (7th ed.) Zitazioa

(1987). Clean coal technology: Programmes and issues. OCDE.

Chicago Style (17th ed.) Zitazioa

Clean Coal Technology: Programmes and Issues. paris: OCDE, 1987.

MLA (9th ed.) Zitazioa

Clean Coal Technology: Programmes and Issues. OCDE, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.