APA aipamena

WMO. WMO: Special Environmental Report-Drought. WMO.

Chicago Style aipamena

WMO. WMO: Special Environmental Report-Drought. Switzerland: WMO.

MLA aipamena

WMO. WMO: Special Environmental Report-Drought. WMO.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.