Não informado. (1978). National food review. U.S. Department of Agriculture, National Economics Division.
Chicago-referens (17:e uppl.)Não informado. National Food Review. Washington: U.S. Department of Agriculture, National Economics Division, 1978.
MLA-referens (8:e uppl.)Não informado. National Food Review. U.S. Department of Agriculture, National Economics Division, 1978.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.