Karelis, C. (2007). The persistence of poverty: Why the economics of the well-off can't help the poor. Yale University Press.
Dyfyniad Arddull ChicagoKarelis, Charles. The Persistence of Poverty: Why the Economics of the Well-off Can't Help the Poor. New Haven: Yale University Press, 2007.
Dyfyniad MLAKarelis, Charles. The Persistence of Poverty: Why the Economics of the Well-off Can't Help the Poor. Yale University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.