APA (7th ed.) Zitazioa
Pile foundation / Chellis, Robert D: McGraw Hill Book 2nd ed (2nd ed.).
Chicago Style (17th ed.) Zitazioa
Pile Foundation / Chellis, Robert D: McGraw Hill Book 2nd Ed. 2nd ed.
MLA (9th ed.) Zitazioa
Pile Foundation / Chellis, Robert D: McGraw Hill Book 2nd Ed. 2nd ed.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.