APA
E.U.A. Soil Conservation Service, Cornell University. Ithaca N. A. D., . (1987). Keys to soil taxonomy. Ithaca, N.Y: The Service.
Chicago
E.U.A. Soil Conservation Service, Cornell University. Ithaca N.Y Agronomy Department, . 1987. Keys to soil taxonomy. Ithaca, N.Y: The Service.
Harvard
E.U.A. Soil Conservation Service, Cornell University. Ithaca N. A. D., . (1987). Keys to soil taxonomy. Ithaca, N.Y: The Service.
MLA
E.U.A. Soil Conservation Service, Cornell University. Ithaca N.Y Agronomy Department, . Keys to soil taxonomy. Ithaca, N.Y: The Service. 1987.
