APA (7th ed.) Zitazioa

Renfrew. Life without Lead. University of California Press.

Chicago Style (17th ed.) Zitazioa

Renfrew. Life Without Lead. University of California Press.

MLA (9th ed.) Zitazioa

Renfrew. Life Without Lead. University of California Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.