Não informado. (1962). Farm index. U.S. Department of Agriculture, Economic Research Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Farm Index. Washington: U.S. Department of Agriculture, Economic Research Service, 1962.
MLA-Zitierstil (8. Ausg.)Não informado. Farm Index. U.S. Department of Agriculture, Economic Research Service, 1962.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.