Não informado. (2007). Annual report of the Director to the Board of Trustees. Chicago Natural History Museum.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Annual Report of the Director to the Board of Trustees. Chicago, Ill: Chicago Natural History Museum, 2007.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Annual Report of the Director to the Board of Trustees. Chicago Natural History Museum, 2007.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.