Cita APA

Norman W Hudson. (1987). FAO soils bulletin N.57: Soil and water conservation in semi-arid areas. Rome: FAO.

Chicago Style Citation

Norman W Hudson. FAO Soils Bulletin N.57: Soil and Water Conservation in Semi-arid Areas. Rome: FAO, 1987.

Cita MLA

Norman W Hudson. FAO Soils Bulletin N.57: Soil and Water Conservation in Semi-arid Areas. Rome: FAO, 1987.

Atenció: Aquestes cites poden no estar 100% correctes.