Não informado. (2002). Bulletin of the Natural History Survey of the Chicago Academy of Sciences. Chicago Academy of Sciences.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the Natural History Survey of the Chicago Academy of Sciences. Chicago, Ill: Chicago Academy of Sciences, 2002.
MLA-referens (8:e uppl.)Não informado. Bulletin of the Natural History Survey of the Chicago Academy of Sciences. Chicago Academy of Sciences, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.