FAO. (2002). Major soils of the world. Rome: Food and Agriculture Organization of the United Nations.
استشهاد بنمط شيكاغوFAO. Major Soils of the World. Rome: Food and Agriculture Organization of the United Nations, 2002.
MLA استشهادFAO. Major Soils of the World. Rome: Food and Agriculture Organization of the United Nations, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.