(1973). Soil organic matter and its role in crop: Production. Elsevier.
Citazione stile Chigago Style (17a edizione)Soil Organic Matter and Its Role in Crop: Production. Amsterdam: Elsevier, 1973.
Citatione MLA (9a ed.)Soil Organic Matter and Its Role in Crop: Production. Elsevier, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.