Cita APA (7th ed.)

Nayfeh, A. H. (1973). Perturbation methods. Wiley.

Cita Chicago (17th ed.)

Nayfeh, Ali Hasan. Perturbation Methods. New York, N.Y.: Wiley, 1973.

Cita MLA (8th ed.)

Nayfeh, Ali Hasan. Perturbation Methods. Wiley, 1973.