ebrary, Inc. (1993). Agricultural crop issues and policies. National Academy Press.
Chicago-čujuhus (17. p.)ebrary, Inc. Agricultural Crop Issues and Policies. Washington, D.C.: National Academy Press, 1993.
MLA-čujuhus (9. p.)ebrary, Inc. Agricultural Crop Issues and Policies. National Academy Press, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.