Williams, D., & Butler, B. (2010). The Tallgrass Prairie Center guide to seed and seedling identification in the Upper Midwest. Published for the Tallgrass Prairie Center by the University of Iowa Press.
Chicago Style (17th ed.) CitationWilliams, Dave, and Brent Butler. The Tallgrass Prairie Center Guide to Seed and Seedling Identification in the Upper Midwest. Iowa City: Published for the Tallgrass Prairie Center by the University of Iowa Press, 2010.
MLA (8th ed.) CitationWilliams, Dave, and Brent Butler. The Tallgrass Prairie Center Guide to Seed and Seedling Identification in the Upper Midwest. Published for the Tallgrass Prairie Center by the University of Iowa Press, 2010.
Warning: These citations may not always be 100% accurate.