FAO. (2000). Soil and terrain database, land degradation status and soil vulnerability assessment for central and eastern Europe: Version 1.0. Rome: Food and Agriculture Organization of the United Nations.
استشهاد بنمط شيكاغوFAO. Soil and Terrain Database, Land Degradation Status and Soil Vulnerability Assessment for Central and Eastern Europe: Version 1.0. Rome: Food and Agriculture Organization of the United Nations, 2000.
MLA استشهادFAO. Soil and Terrain Database, Land Degradation Status and Soil Vulnerability Assessment for Central and Eastern Europe: Version 1.0. Rome: Food and Agriculture Organization of the United Nations, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.