APA Style
Soil erosion and crop productivity. (1985).
Wisconsin, USA:
American Society of Agronomy, Inc.[etc.].
Chicago Style
Soil erosion and crop productivity.
.
Wisconsin, USA:
American Society of Agronomy, Inc.[etc.],
1985.
Text.
MLA Style
Soil erosion and crop productivity.
.
Wisconsin, USA:
American Society of Agronomy, Inc.[etc.],
1985.
Text.
Turabian Style
Soil erosion and crop productivity.
Wisconsin, USA:
American Society of Agronomy, Inc.[etc.],
1985.
Print.