HARRIS, F. (1983). Ground Engineering equipment and methods. McGraw-hill.
Cita Chicago (17th ed.)HARRIS, Frank. Ground Engineering Equipment and Methods. New York: McGraw-hill, 1983.
Cita MLA (9th ed.)HARRIS, Frank. Ground Engineering Equipment and Methods. McGraw-hill, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.