Não informado. (2021). Illinois Bulletin. University of Illinois at Urbana-Champaign, Agricultural Experiment Station.
Chicago Style (17. basım) AtıfNão informado. Illinois Bulletin. Urbana, Ill: University of Illinois at Urbana-Champaign, Agricultural Experiment Station, 2021.
MLA (8th ed.) AtıfNão informado. Illinois Bulletin. University of Illinois at Urbana-Champaign, Agricultural Experiment Station, 2021.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..