Cita APA (7a ed.)

Lefschetz, S., & Cesari, L. (1950). Contributions to the theory of nonlinear oscillations. Princeton University Press.

Cita Chicago Style (17a ed.)

Lefschetz, Solomon, y Lamberto Cesari. Contributions to the Theory of Nonlinear Oscillations. Princeton: Princeton University Press, 1950.

Cita MLA (8a ed.)

Lefschetz, Solomon, y Lamberto Cesari. Contributions to the Theory of Nonlinear Oscillations. Princeton University Press, 1950.