Não informado. (1891). Bulletin of the Washington Agricultural Experiment Station. Washington Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. Bulletin of the Washington Agricultural Experiment Station. Pullman, Wash: Washington Agricultural Experiment Station, 1891.
MLA-Zitierstil (8. Ausg.)Não informado. Bulletin of the Washington Agricultural Experiment Station. Washington Agricultural Experiment Station, 1891.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.