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