APA Style
Kohnke, Helmut. (1959).
Soil conservation (1).
New York:
McGraw-Hill Book Coy. Inc..
Chicago Style
Kohnke, Helmut.
Soil conservation.
1
New York:
McGraw-Hill Book Coy. Inc.,
1959.
Hard Copy.
MLA Style
Kohnke, Helmut.
Soil conservation.
1
New York:
McGraw-Hill Book Coy. Inc.,
1959.
Hard Copy.
Turabian Style
Kohnke, Helmut.
Soil conservation.
1
New York:
McGraw-Hill Book Coy. Inc.,
1959.
Hard Copy.