Não informado. (2020). Progress Report. Pennsylvania State University, Agricultural Experiment Station.
Čikaški stil citiranja (17. izdanje)Não informado. Progress Report. University Park, Pa: Pennsylvania State University, Agricultural Experiment Station, 2020.
MLA način citiranja (8. izdanje)Não informado. Progress Report. Pennsylvania State University, Agricultural Experiment Station, 2020.
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