Cita APA (7a ed.)

Troeh, F. R., & Hobbs, J. A. (1991). Soil and water conservation (2nd edition.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Troeh, Frederick R., y J. Arthur Hobbs. Soil and Water Conservation. 2nd edition. New Jersey: Prentice-Hall, 1991.

Cita MLA (8a ed.)

Troeh, Frederick R., y J. Arthur Hobbs. Soil and Water Conservation. 2nd edition. Prentice-Hall, 1991.