APA (7th ed.) Citation

(1985). Soil erosion and crop productivity. American Soc. of Agronomy [u.a.].

Chicago Style (17th ed.) Citation

Soil Erosion and Crop Productivity. Madison, Wis: American Soc. of Agronomy [u.a.], 1985.

MLA (9th ed.) Citation

Soil Erosion and Crop Productivity. American Soc. of Agronomy [u.a.], 1985.