Chicago Natural History Museum. (1944). Report of the Director to the Board of Trustees for the year ... The Museum.
Chicago-referens (17:e uppl.)Chicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... [Chicago]: The Museum, 1944.
MLA-referens (8:e uppl.)Chicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... The Museum, 1944.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.