APA aipamena

FAO. (1993). World soil resources reports N.66.1: World soil resources. Rome: FAO.

Chicago Style aipamena

FAO. World Soil Resources Reports N.66.1: World Soil Resources. Rome: FAO, 1993.

MLA aipamena

FAO. World Soil Resources Reports N.66.1: World Soil Resources. Rome: FAO, 1993.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.