Não informado. (2007). Annual report of the Director to the Board of Trustees. Chicago Natural History Museum.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Annual Report of the Director to the Board of Trustees. Chicago, Ill: Chicago Natural History Museum, 2007.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Annual Report of the Director to the Board of Trustees. Chicago Natural History Museum, 2007.
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