Não informado. (2018). Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers.
Chicago-referens (17:e uppl.)Não informado. Report on the Illinois State Museum of Natural History. Springfield, Ill: Phillips Bros., State Printers, 2018.
MLA-referens (8:e uppl.)Não informado. Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.