Cita APA (7a ed.)

United States. Soil Conservation Service. Erosion in Washington: Causes and effects. s.n..

Cita Chicago Style (17a ed.)

United States. Soil Conservation Service. Erosion in Washington: Causes and Effects. [United States: s.n..

Cita MLA (8a ed.)

United States. Soil Conservation Service. Erosion in Washington: Causes and Effects. s.n..

Precaución: Estas citas no son 100% exactas.