O'brien, J. J. (1996). Standard hanbook of heavy construction (3rd ed.). McGraw-Hill.
Chicago Edition CitationO'brien, James J. Standard Hanbook of Heavy Construction. 3rd ed. New York: McGraw-Hill, 1996.
Cita MLAO'brien, James J. Standard Hanbook of Heavy Construction. 3rd ed. McGraw-Hill, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.