TROEH, F. R., HOBBS, J. A., & DONAHOUE, R. L. (1980). Soil and water conservation: For productivity and environmental protection. Prentice-Hall.
Citace podle Chicago (17th ed.)TROEH, Frederick R., J. Arthur HOBBS, a Roy L. DONAHOUE. Soil and Water Conservation: For Productivity and Environmental Protection. Englewood Cliffs: Prentice-Hall, 1980.
Citace podle MLA (9th ed.)TROEH, Frederick R., et al. Soil and Water Conservation: For Productivity and Environmental Protection. Prentice-Hall, 1980.
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