APA (7th ed.) Zitazioa

Frey. Diversity Explosion. Brookings Institution Press.

Chicago Style (17th ed.) Zitazioa

Frey. Diversity Explosion. Brookings Institution Press.

MLA (9th ed.) Zitazioa

Frey. Diversity Explosion. Brookings Institution Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.