Cita APA (7th ed.)

(1973). Soil organic matter and its role in crop: Production. Elsevier.

Cita Chicago (17th ed.)

Soil Organic Matter and Its Role in Crop: Production. Amsterdam: Elsevier, 1973.

Cita MLA (9th ed.)

Soil Organic Matter and Its Role in Crop: Production. Elsevier, 1973.