Cita APA (7th ed.)
Pile foundation / Chellis, Robert D: McGraw Hill Book 2nd ed (2nd ed.).
Cita Chicago (17th ed.)
Pile Foundation / Chellis, Robert D: McGraw Hill Book 2nd Ed. 2nd ed.
Cita MLA (9th ed.)
Pile Foundation / Chellis, Robert D: McGraw Hill Book 2nd Ed. 2nd ed.
Atenció: Aquestes cites poden no estar 100% correctes.