Citazione APA

Nichols, H. L., & Day, D. A. (2010). Moving the earth: The workbook of excavation (6th ed.). McGraw-Hill.

Stile di citazione Chicago

Nichols, Herbert L., e David A. Day. Moving the Earth: The Workbook of Excavation. 6th ed. New York, NY: McGraw-Hill, 2010.

Citazione MLA

Nichols, Herbert L., e David A. Day. Moving the Earth: The Workbook of Excavation. 6th ed. McGraw-Hill, 2010.