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