Cita APA (7th ed.)
Preston, H. K. Practical prestressed concrete. McGraw Hill.
Cita Chicago (17th ed.)
Preston, H. Kent. Practical Prestressed Concrete. New York: McGraw Hill.
Cita MLA (9th ed.)
Preston, H. Kent. Practical Prestressed Concrete. McGraw Hill.
Atenció: Aquestes cites poden no estar 100% correctes.