Não informado. (2012). Purdue Agriculture Reports. Purdue University, Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. Purdue Agriculture Reports. West Lafayette, Ind: Purdue University, Agricultural Experiment Station, 2012.
MLA-Zitierstil (8. Ausg.)Não informado. Purdue Agriculture Reports. Purdue University, Agricultural Experiment Station, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.