Não informado. (2008). Publications from the Department of Botany, University of Helsinki. University of Helsinki.
Čikaški stil citiranja (17. izdanje)Não informado. Publications from the Department of Botany, University of Helsinki. Helsinki: University of Helsinki, 2008.
MLA način citiranja (8. izdanje)Não informado. Publications from the Department of Botany, University of Helsinki. University of Helsinki, 2008.
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