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