Nayfeh, A. (1985). Problems in perturbation. John-Wiley and sons.
Dyfyniad Arddull ChicagoNayfeh, A.H. Problems in Perturbation. New York: John-Wiley and sons, 1985.
Dyfyniad MLANayfeh, A.H. Problems in Perturbation. John-Wiley and sons, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.