Cita APA

Troeh, F. R., & Donahue, R. L. (1980). Soil and water conservation. Prentice-Hall.

Citación estilo Chicago

Troeh, Fredrick R., and Roy L. Donahue. Soil and Water Conservation. New Jersey: Prentice-Hall, 1980.

Cita MLA

Troeh, Fredrick R., and Roy L. Donahue. Soil and Water Conservation. Prentice-Hall, 1980.