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Lua i Stíl Chicago (17ú heag.)SOIL EROSION AND ITS CONTROL agus R.P.C. [ed] MORGAN. Soil Erosion and Its Control/editor R.P.C. Morgan. New York: Van Nostrand Reinhold Company, 1986.
Lua MLA (9ú heag.)SOIL EROSION AND ITS CONTROL agus R.P.C. [ed] MORGAN. Soil Erosion and Its Control/editor R.P.C. Morgan. Van Nostrand Reinhold Company, 1986.
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