(1992). An outline of American economy. New York: United States Information Agency.
Dyfyniad Arddull ChicagoAn Outline of American Economy. New York: United States Information Agency, 1992.
Dyfyniad MLAAn Outline of American Economy. New York: United States Information Agency, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.