Não informado. (1876). Bulletin of the Illinois State Museum of Natural History. Illinois State Museum of Natural History.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the Illinois State Museum of Natural History. Springfield, Ill: Illinois State Museum of Natural History, 1876.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the Illinois State Museum of Natural History. Illinois State Museum of Natural History, 1876.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.