Cita APA (7th ed.)

Nayfeh, A. H. (1981). Introduction to pertubation techiques. John Wiley & Sons.

Cita Chicago (17th ed.)

Nayfeh, Ali Hasan. Introduction to Pertubation Techiques. Nueva York: John Wiley & Sons, 1981.

Cita MLA (9th ed.)

Nayfeh, Ali Hasan. Introduction to Pertubation Techiques. John Wiley & Sons, 1981.