O`Neill, E. (1988). Complete plays 1920 - 1931. The Library of America.
Cita Chicago Style (17a ed.)O`Neill, Eugene. Complete Plays 1920 - 1931. New York, Estados Unidos: The Library of America, 1988.
Cita MLA (9a ed.)O`Neill, Eugene. Complete Plays 1920 - 1931. The Library of America, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.