APA
Oschwald W. R., Soil Science Society of America, . (1978). Crop residue management systems. Madison: American Society of Agronomy.
Chicago
Oschwald W R, Soil Science Society of America, . 1978. Crop residue management systems. Madison: American Society of Agronomy.
Harvard
Oschwald W. R., Soil Science Society of America, . (1978). Crop residue management systems. Madison: American Society of Agronomy.
MLA
Oschwald W R, Soil Science Society of America, . Crop residue management systems. Madison: American Society of Agronomy. 1978.