Nayfeh, A. H. (1973). Perturbation methods. Wiley.
Chicago Style aipamenaNayfeh, Ali Hasan. Perturbation Methods. New York, N.Y.: Wiley, 1973.
MLA aipamenaNayfeh, Ali Hasan. Perturbation Methods. Wiley, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.