APA (7th ed.) Citation

Nayfeh, A. H. (1981). Introduction to perturbation techniques. Wiley.

Chicago Style (17th ed.) Citation

Nayfeh, Ali Hasan. Introduction to Perturbation Techniques. New York: Wiley, 1981.

MLA (9th ed.) Citation

Nayfeh, Ali Hasan. Introduction to Perturbation Techniques. Wiley, 1981.