Não informado. (2002). Rural America. U.S. Department of Agriculture, Economic Research Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Rural America. Washington: U.S. Department of Agriculture, Economic Research Service, 2002.
MLA-Zitierstil (8. Ausg.)Não informado. Rural America. U.S. Department of Agriculture, Economic Research Service, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.