Cita APA (7a ed.)

Lanczos, C. (1965). The variational principles of mechanics (4a.). Dover Publications.

Cita Chicago Style (17a ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 4a. New York: Dover Publications, 1965.

Cita MLA (8a ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 4a. Dover Publications, 1965.