Não informado. (2018). Research Report. Virginia Agricultural Experiment Station, Virginia Polytechnic Institute.
Čikaški stil citiranja (17. izdanje)Não informado. Research Report. Blacksburg, Va: Virginia Agricultural Experiment Station, Virginia Polytechnic Institute, 2018.
MLA način citiranja (8. izdanje)Não informado. Research Report. Virginia Agricultural Experiment Station, Virginia Polytechnic Institute, 2018.
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