Gaya APA

SURVICE, U, D, O, A, S, C. (1988). Soil taxonomy: A basic of soil classification for making and interpreting soil survey . : Robert E. Kriger Publ. Co..

Gaya MLA

SURVICE, U.S., DEPARTMENT, OF, AGRICULTURE;, SOIL, CONSERVATION. "Soil taxonomy: A basic of soil classification for making and interpreting soil survey". : Robert E. Kriger Publ. Co., 1988. Buku.