Cita APA

Unger, P. W. (2006). Soil and water conservation handbook: Policies, practices, conditions, and terms. New York, United States: Haworth Food & Agricultural Products.

Citación estilo Chicago

Unger, Paul W. Soil and Water Conservation Handbook: Policies, Practices, Conditions, and Terms. New York, United States: Haworth Food & Agricultural Products, 2006.

Cita MLA

Unger, Paul W. Soil and Water Conservation Handbook: Policies, Practices, Conditions, and Terms. New York, United States: Haworth Food & Agricultural Products, 2006.