Παραπομπή APA

Nayfeh, A. (1985). Problems in perturbation. John-Wiley and sons.

Παραπομπή Chicago Style

Nayfeh, A.H. Problems in Perturbation. New York: John-Wiley and sons, 1985.

Παραπομπή MLA

Nayfeh, A.H. Problems in Perturbation. John-Wiley and sons, 1985.