(2000). American poetry: The tweentieth century. New York, NY: The Library of America.
Dyfyniad Arddull ChicagoAmerican Poetry: The Tweentieth Century. New York, NY: The Library of America, 2000.
Dyfyniad MLAAmerican Poetry: The Tweentieth Century. New York, NY: The Library of America, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.