Não informado. (2018). Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers.
Chicago-viite (17. p.)Não informado. Report on the Illinois State Museum of Natural History. Springfield, Ill: Phillips Bros., State Printers, 2018.
MLA-viite (8. p.)Não informado. Report on the Illinois State Museum of Natural History. Phillips Bros., State Printers, 2018.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.