APA

Bennett H. H., . (1939). Soil conservation. New York: McGraw-Hill.

Chicago

Bennett Hugh Hammond, . 1939. Soil conservation. New York: McGraw-Hill.

Harvard

Bennett H. H., . (1939). Soil conservation. New York: McGraw-Hill.

MLA

Bennett Hugh Hammond, . Soil conservation. New York: McGraw-Hill. 1939.