C J Pearson. (1995). FAO soils bulletin: N.72: Sustainable dryland cropping in relation to soil productivity. Rome: FAO.
استشهاد بنمط شيكاغوC J Pearson. FAO Soils Bulletin: N.72: Sustainable Dryland Cropping in Relation to Soil Productivity. Rome: FAO, 1995.
MLA استشهادC J Pearson. FAO Soils Bulletin: N.72: Sustainable Dryland Cropping in Relation to Soil Productivity. Rome: FAO, 1995.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.