APA-referens

Soil survey staff. (1990). Keys to soil taxonomy. Blacksburg, Va: Virginia Polytechnic Institute and State University.

Chicago-stil citat

Soil survey staff. Keys to Soil Taxonomy. Blacksburg, Va: Virginia Polytechnic Institute and State University, 1990.

MLA-referens

Soil survey staff. Keys to Soil Taxonomy. Blacksburg, Va: Virginia Polytechnic Institute and State University, 1990.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.