Weeks, S. S., & Weeks, H. P., Jr. (2012). Shrubs and woody vines of Indiana and the Midwest: Identification, wildlife values, and landscaping use. Purdue University Press.

Weeks, Sally S., and Harmon P. Weeks, Jr. Shrubs and Woody Vines of Indiana and the Midwest: Identification, Wildlife Values, and Landscaping Use. West Lafayette, Ind.: Purdue University Press, 2012.

Weeks, Sally S., and Harmon P. Weeks, Jr. Shrubs and Woody Vines of Indiana and the Midwest: Identification, Wildlife Values, and Landscaping Use. Purdue University Press, 2012.