Field guide to the skipper butterflies of Illinois /
John K. Bouseman, James G. Sternburg, James R. Wiker.

APA Citation

Bouseman, J. K., Wiker, J. R., Sternburg, J. G. (James Gordon)., Illinois. Natural History Survey Division. (2006). Field guide to the skipper butterflies of Illinois. Champaign: Illinois Natural History Survey.

MLA Citation

Bouseman, John K, James R Wiker, James G. (James Gordon) Sternburg, and Illinois. Natural History Survey Division. Field Guide to the Skipper Butterflies of Illinois. Champaign: Illinois Natural History Survey, 2006.