Cita APA (7th ed.)

Charlton, T. M. (1973). Energy principles in theory of structures. Oxford University Press.

Cita Chicago (17th ed.)

Charlton, T. M. Energy Principles in Theory of Structures. London, ; New York,: Oxford University Press, 1973.

Cita MLA (8th ed.)

Charlton, T. M. Energy Principles in Theory of Structures. Oxford University Press, 1973.

Atenció: Aquestes cites poden no estar 100% correctes.