Bennett, H. H. (1939). Soil conservation. McGraw-Hill.
Chicago-čujuhus (17. p.)Bennett, Hugh Hammond. Soil Conservation. New York: McGraw-Hill, 1939.
MLA-čujuhus (9. p.)Bennett, Hugh Hammond. Soil Conservation. McGraw-Hill, 1939.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.