APA-referens

World soil resources reports. (1991). World soil resources: An explanatory note on the FAO world soil resources map at 1:25,000,000 scale. Rome: Food and Agriculture Organization of the United Nations.

Chicago-stil citat

World soil resources reports. World Soil Resources: An Explanatory Note On the FAO World Soil Resources Map At 1:25,000,000 Scale. Rome: Food and Agriculture Organization of the United Nations, 1991.

MLA-referens

World soil resources reports. World Soil Resources: An Explanatory Note On the FAO World Soil Resources Map At 1:25,000,000 Scale. Rome: Food and Agriculture Organization of the United Nations, 1991.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.