APA (7th ed.) Citation

Zwicker, S. E. (1992). Soil survey of Bureau County, Illinois. The Service.

Chicago Style (17th ed.) Citation

Zwicker, S. E. Soil Survey of Bureau County, Illinois. [Washington, D.C.?]: The Service, 1992.

MLA (9th ed.) Citation

Zwicker, S. E. Soil Survey of Bureau County, Illinois. The Service, 1992.

Warning: These citations may not always be 100% accurate.