Donahue, R. L. (1961). Our soils and their management: An introduction to soil and water conservation ([2d ed.].). Interstate Printers and Publishers.
Citace podle Chicago (17th ed.)Donahue, Roy Luther. Our Soils and Their Management: An Introduction to Soil and Water Conservation. [2d ed.]. Danville, Ill.: Interstate Printers and Publishers, 1961.
Citace podle MLA (8th ed.)Donahue, Roy Luther. Our Soils and Their Management: An Introduction to Soil and Water Conservation. [2d ed.]. Interstate Printers and Publishers, 1961.
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