Khanna, P. N. Practical Civil Engineers' Handbook (4th ed.).
Cita Chicago (17th ed.)Khanna, P. N. Practical Civil Engineers' Handbook. 4th ed.
Cita MLA (9th ed.)Khanna, P. N. Practical Civil Engineers' Handbook. 4th ed.
Atenció: Aquestes cites poden no estar 100% correctes.