Cita APA

Kohnke, H., & Bertrand, A. R. (1959). Soil conservation. McGraw-Hill.

Citación estilo Chicago

Kohnke, Helmut, and Anson Rabb Bertrand. Soil Conservation. New York: McGraw-Hill, 1959.

Cita MLA

Kohnke, Helmut, and Anson Rabb Bertrand. Soil Conservation. New York: McGraw-Hill, 1959.