Não informado. Agricultural reviews and manuals. Agricultural Research Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Agricultural Reviews and Manuals. New Orleans, La: Agricultural Research Service.
MLA-Zitierstil (8. Ausg.)Não informado. Agricultural Reviews and Manuals. Agricultural Research Service.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.