APA (7th ed.) Citation

Walker, M. B. (1992). Soil survey of Peoria County, Illinois. The Service.

Chicago Style (17th ed.) Citation

Walker, Michael B. Soil Survey of Peoria County, Illinois. [Washington, D.C.?]: The Service, 1992.

MLA (9th ed.) Citation

Walker, Michael B. Soil Survey of Peoria County, Illinois. The Service, 1992.