Não informado. (2004). Foreign crops and markets. U.S. Department of Agriculture, Foreign Agricultural Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Foreign Crops and Markets. Washington: U.S. Department of Agriculture, Foreign Agricultural Service, 2004.
MLA-Zitierstil (8. Ausg.)Não informado. Foreign Crops and Markets. U.S. Department of Agriculture, Foreign Agricultural Service, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.