Readle, E. L. (1990). Soil survey of Putnam County area, Florida. U.S. Dept. of Agriculture, Soil Conservation Service.
Chicago Style (17th ed.) CitationReadle, Elmer L. Soil Survey of Putnam County Area, Florida. [Washington, D.C.?]: U.S. Dept. of Agriculture, Soil Conservation Service, 1990.
MLA (9th ed.) CitationReadle, Elmer L. Soil Survey of Putnam County Area, Florida. U.S. Dept. of Agriculture, Soil Conservation Service, 1990.
Warning: These citations may not always be 100% accurate.