APA (7th ed.) Zitazioa

(2019). Environmental and Sustainability Indicators. Elsevier.

Chicago Style (17th ed.) Zitazioa

Environmental and Sustainability Indicators. Elsevier, 2019.

MLA (9th ed.) Zitazioa

Environmental and Sustainability Indicators. Elsevier, 2019.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.