Troeh, F. R., Hobbs, J. A., & Donahue, R. L. (1999). Soil and water conservation: Productivity and environmental protection (3a. ed.). Prentice Hall.
Citace podle Chicago (17th ed.)Troeh, Frederick R., J. Arthur Hobbs, a Roy L. Donahue. Soil and Water Conservation: Productivity and Environmental Protection. 3a. ed. Upper Saddle River: Prentice Hall, 1999.
Citace podle MLA (9th ed.)Troeh, Frederick R., et al. Soil and Water Conservation: Productivity and Environmental Protection. 3a. ed. Prentice Hall, 1999.
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