Trích dẫn APA

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.

Trích dẫn kiểu Chicago

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.

Trích dẫn MLA

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.

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