Não informado. (2007). Report of the Iowa Agricultural Experiment Station for de two years. Agricultural Experiment Station.
Čikaški stil citiranja (17. izdanje)Não informado. Report of the Iowa Agricultural Experiment Station for De Two Years. Ames, Iowa: Agricultural Experiment Station, 2007.
MLA način citiranja (8. izdanje)Não informado. Report of the Iowa Agricultural Experiment Station for De Two Years. Agricultural Experiment Station, 2007.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.