Cita APA (7th ed.)
Das, B. M. Principles of Foundation Engineering. Cengage Learning.
Cita Chicago (17th ed.)
Das, Braja M. Principles of Foundation Engineering. Boston, EUA: Cengage Learning.
Cita MLA (9th ed.)
Das, Braja M. Principles of Foundation Engineering. Cengage Learning.
Atenció: Aquestes cites poden no estar 100% correctes.