APA (7th ed.) Zitazioa

Gardner. HEARTS OF GOLD. West Virginia University Press.

Chicago Style (17th ed.) Zitazioa

Gardner. HEARTS OF GOLD. West Virginia University Press.

MLA (9th ed.) Zitazioa

Gardner. HEARTS OF GOLD. West Virginia University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.