Gaya APA

Nayfeh, A, H. (1981). Introduction to perturbation techniques / Ali Hasan Nayeeh . New York: John Wiley n Sons.

Gaya MLA

Nayfeh, Ali, Hasan. "Introduction to perturbation techniques / Ali Hasan Nayeeh". New York: John Wiley n Sons, 1981. Textbook.