FAO. (1991). World soil resources reports N.71.4: Agro-ecological land resources assessment for agricultural development planning. Rome: FAO.
استشهاد بنمط شيكاغوFAO. World Soil Resources Reports N.71.4: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.
MLA استشهادFAO. World Soil Resources Reports N.71.4: Agro-ecological Land Resources Assessment for Agricultural Development Planning. Rome: FAO, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.