Soil Survey Staff. (1975). Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. Soil Conservation Service.
Cita Chicago Style (17a ed.)Soil Survey Staff. Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. Washington, D.C: Soil Conservation Service, 1975.
Cita MLA (9a ed.)Soil Survey Staff. Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys. Soil Conservation Service, 1975.
Precaución: Estas citas no son 100% exactas.