APA (7th ed.) Zitazioa

Brusentsev. Disasters in the United States. W.E. Upjohn Institute.

Chicago Style (17th ed.) Zitazioa

Brusentsev. Disasters in the United States. W.E. Upjohn Institute.

MLA (9th ed.) Zitazioa

Brusentsev. Disasters in the United States. W.E. Upjohn Institute.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.