APA (7th ed.) Zitazioa

Hayton. The Crown and the Cosmos. University of Pittsburgh Press.

Chicago Style (17th ed.) Zitazioa

Hayton. The Crown and the Cosmos. University of Pittsburgh Press.

MLA (9th ed.) Zitazioa

Hayton. The Crown and the Cosmos. University of Pittsburgh Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.