Não informado. (1926). Yearbook of agriculture. U.S. Department of Agriculture.
Chicago-Zitierstil (17. Ausg.)Não informado. Yearbook of Agriculture. Washington: U.S. Department of Agriculture, 1926.
MLA-Zitierstil (8. Ausg.)Não informado. Yearbook of Agriculture. U.S. Department of Agriculture, 1926.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.