APA (7th ed.) Citation

LaBerge, W. E., & Thorp, R. W. (2005). A revision of the bees of the genus Andrena of the Western Hemisphere. Illinois Natural History Survey.

Chicago Style (17th ed.) Citation

LaBerge, Wallace E., and Robbin W. Thorp. A Revision of the Bees of the Genus Andrena of the Western Hemisphere. Champaign, Ill.: Illinois Natural History Survey, 2005.

MLA (8th ed.) Citation

LaBerge, Wallace E., and Robbin W. Thorp. A Revision of the Bees of the Genus Andrena of the Western Hemisphere. Illinois Natural History Survey, 2005.