ONeill, E. A. (1989). The plays of Eugene ONeill (1989.).
Dyfyniad Arddull ChicagoONeill, Eugene; Author. The Plays of Eugene ONeill. 1989. New Delhi, East-West Press, 1989.
Dyfyniad MLAONeill, Eugene; Author. The Plays of Eugene ONeill. 1989. 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.