Não informado. (1919). 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, 1919.
MLA-Zitierstil (8. Ausg.)Não informado. Foreign Crops and Markets. U.S. Department of Agriculture, Foreign Agricultural Service, 1919.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.