Nichols, H. L., & Day, D. A. (2010). Moving the earth: The workbook of excavation (6th ed.). McGraw-Hill.
Citace podle Chicago (17th ed.)Nichols, Herbert L., a David A. Day. Moving the Earth: The Workbook of Excavation. 6th ed. New York, NY: McGraw-Hill, 2010.
Citace podle MLA (8th ed.)Nichols, Herbert L., a David A. Day. Moving the Earth: The Workbook of Excavation. 6th ed. McGraw-Hill, 2010.
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