Não informado. (2001). Annual report of the United States Department of Agriculture. U.S. Department of Agriculture.
Chicago (17e ed.) BronvermeldingNão informado. Annual Report of the United States Department of Agriculture. Washington: U.S. Department of Agriculture, 2001.
MLA (8e ed.) BronvermeldingNão informado. Annual Report of the United States Department of Agriculture. U.S. Department of Agriculture, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.