Troeh, F., Hobbs, J. A., & Donahue, R. L. (1991). Soil and water conservation (2nd ed.). Prentice-Hall.
Chicago Style (17th ed.) CitationTroeh, Frederick, J. Arthur Hobbs, and Roy Luther Donahue. Soil and Water Conservation. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1991.
MLA citiranjeTroeh, Frederick, et al. Soil and Water Conservation. 2nd ed. Prentice-Hall, 1991.
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