APA (7th ed.) Citation

Higgins, S. K. (1987). Soil survey of Monroe County, Illinois. The Service.

Chicago Style (17th ed.) Citation

Higgins, S. K. Soil Survey of Monroe County, Illinois. [Washington, D.C.?]: The Service, 1987.

MLA (9th ed.) Citation

Higgins, S. K. Soil Survey of Monroe County, Illinois. The Service, 1987.

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