Cita APA (7a ed.)
Cooperation, T. C. f. A. a. R. (1990). Contour: Information on soil and water conservation. Technical Centre for Agricultural and Rural Cooperation.
Cita Chicago Style (17a ed.)
Cooperation, Technical Centre for Agricultural and Rural. Contour: Information on Soil and Water Conservation. Technical Centre for Agricultural and Rural Cooperation, 1990.
Cita MLA (9a ed.)
Cooperation, Technical Centre for Agricultural and Rural. Contour: Information on Soil and Water Conservation. Technical Centre for Agricultural and Rural Cooperation, 1990.
Precaución: Estas citas no son 100% exactas.