O'Neill, E. (1959). Nine plays. modern library.
Dyfyniad Arddull ChicagoO'Neill, Eugene. Nine Plays. New York: modern library, 1959.
Dyfyniad MLAO'Neill, Eugene. Nine Plays. modern library, 1959.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.