Lenski, N. E. (2002). Failure of empire: Valens and the Roman state in the fourth century A.D. University of California Press.
Dyfyniad Arddull ChicagoLenski, Noel Emmanuel. Failure of Empire: Valens and the Roman State in the Fourth Century A.D. Berkeley: University of California Press, 2002.
Dyfyniad MLALenski, Noel Emmanuel. Failure of Empire: Valens and the Roman State in the Fourth Century A.D. University of California Press, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.