Daudu, C. (2008). Organic matter sources, soil fertility and productivity: Evaluation of different sources of organic matter on soil fertilty and productivity. Germany: VDM Verlag Dr. Muller.
استشهاد بنمط شيكاغوDaudu, Christogonus. Organic Matter Sources, Soil Fertility and Productivity: Evaluation of Different Sources of Organic Matter On Soil Fertilty and Productivity. Germany: VDM Verlag Dr. Muller, 2008.
MLA استشهادDaudu, Christogonus. Organic Matter Sources, Soil Fertility and Productivity: Evaluation of Different Sources of Organic Matter On Soil Fertilty and Productivity. Germany: VDM Verlag Dr. Muller, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.