APA

Kohnke H., . (1968). Soil physics. New York: McGraw-Hill.

Chicago

Kohnke Helmut, . 1968. Soil physics. New York: McGraw-Hill.

Harvard

Kohnke H., . (1968). Soil physics. New York: McGraw-Hill.

MLA

Kohnke Helmut, . Soil physics. New York: McGraw-Hill. 1968.