Illinois Natural History Survey. (2001). Biological notes. Natural History Survey Division.
Cita Chicago Style (17a ed.)Illinois Natural History Survey. Biological Notes. Urbana, Ill: Natural History Survey Division, 2001.
Cita MLA (8a ed.)Illinois Natural History Survey. Biological Notes. Natural History Survey Division, 2001.
Precaución: Estas citas no son 100% exactas.