Não informado. (1949). South Dakota Farm & Home Research. South Dakota Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. South Dakota Farm & Home Research. Brookings, SD: South Dakota Agricultural Experiment Station, 1949.
MLA-Zitierstil (8. Ausg.)Não informado. South Dakota Farm & Home Research. South Dakota Agricultural Experiment Station, 1949.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.