Não informado. (2007). Annual report of the Director to the Board of Trustees. Chicago Natural History Museum.
Čikaški stil citiranja (17. izdanje)Não informado. Annual Report of the Director to the Board of Trustees. Chicago, Ill: Chicago Natural History Museum, 2007.
MLA način citiranja (8. izdanje)Não informado. Annual Report of the Director to the Board of Trustees. Chicago Natural History Museum, 2007.
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