Não informado. (1978). Farmer cooperatives. Department of Agriculture, Agricultural Cooperative Service.
Čikaški stil citiranja (17. izdanje)Não informado. Farmer Cooperatives. Washington: Department of Agriculture, Agricultural Cooperative Service, 1978.
MLA način citiranja (8. izdanje)Não informado. Farmer Cooperatives. Department of Agriculture, Agricultural Cooperative Service, 1978.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.