Cita APA (7a ed.)

Nayfeh, A. H. (1993). Method of normal forms. Wiley & Sons.

Cita Chicago Style (17a ed.)

Nayfeh, Ali Hasan. Method of Normal Forms. New York [etc.]: Wiley & Sons, 1993.

Cita MLA (9a ed.)

Nayfeh, Ali Hasan. Method of Normal Forms. Wiley & Sons, 1993.