APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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