Cita APA (7a ed.)

(1964). Irrigation / Soil Conservation Service, United States Department of Agriculture.

Cita Chicago Style (17a ed.)

Irrigation / Soil Conservation Service, United States Department of Agriculture. 1964.

Cita MLA (9a ed.)

Irrigation / Soil Conservation Service, United States Department of Agriculture. 1964.

Precaución: Estas citas no son 100% exactas.