Cita APA (7th ed.)

Lanczos, C. (1970). The variational principles of mechanics (4a. ed.). Dover.

Cita Chicago (17th ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 4a. ed. Nueva York: Dover, 1970.

Cita MLA (9th ed.)

Lanczos, Cornelius. The Variational Principles of Mechanics. 4a. ed. Dover, 1970.