APA aipamena

European Commission. (2000). World soil resources reports N91: The European soil information system. Rome: FAO.

Chicago Style aipamena

European Commission. World Soil Resources Reports N91: The European Soil Information System. Rome: FAO, 2000.

MLA aipamena

European Commission. World Soil Resources Reports N91: The European Soil Information System. Rome: FAO, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.