United States. Department of Agriculture & United States. Soil Conservation Service. (1994). Keys to soil taxonomy (6th ed.). Pocahontas Press.
Chicago Style (17th ed.) CitationUnited States. Department of Agriculture and United States. Soil Conservation Service. Keys to Soil Taxonomy. 6th ed. Blacksburg, Va.: Pocahontas Press, 1994.
MLA (9th ed.) CitationUnited States. Department of Agriculture and United States. Soil Conservation Service. Keys to Soil Taxonomy. 6th ed. Pocahontas Press, 1994.
Warning: These citations may not always be 100% accurate.