Cita APA (7th ed.)

Lanczos, C. (1962). The variational principles of mechanics (2nd ed. (revised and enlarged).). University of Toronto Press.

Cita Chicago (17th ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 2nd ed. (revised and enlarged). Toronto: University of Toronto Press, 1962.

Cita MLA (8th ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 2nd ed. (revised and enlarged). University of Toronto Press, 1962.