Soil fertility management in suppor of food sercurity in Sub-Saharan Africa. (2001). Soil fertility management in suppor of food sercurity in Sub-Saharan Africa. Rome, Italy: FAO.
استشهاد بنمط شيكاغوSoil fertility management in suppor of food sercurity in Sub-Saharan Africa. Soil Fertility Management in Suppor of Food Sercurity in Sub-Saharan Africa. Rome, Italy: FAO, 2001.
MLA استشهادSoil fertility management in suppor of food sercurity in Sub-Saharan Africa. Soil Fertility Management in Suppor of Food Sercurity in Sub-Saharan Africa. Rome, Italy: FAO, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.