Cita APA

FAO. (1991). World soil resources reports N.66: World soil resources. Rome: FAO.

Chicago Style Citation

FAO. World Soil Resources Reports N.66: World Soil Resources. Rome: FAO, 1991.

Cita MLA

FAO. World Soil Resources Reports N.66: World Soil Resources. Rome: FAO, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.