Não informado. (1978). Farmer cooperatives. Department of Agriculture, Agricultural Cooperative Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Farmer Cooperatives. Washington: Department of Agriculture, Agricultural Cooperative Service, 1978.
MLA-Zitierstil (8. Ausg.)Não informado. Farmer Cooperatives. Department of Agriculture, Agricultural Cooperative Service, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.