Polak, P. (2008). Out of poverty: What works when traditional approaches fail. Berrett-Koehler.
Dyfyniad Arddull ChicagoPolak, Paul. Out of Poverty: What Works When Traditional Approaches Fail. San Francisco, Calif.: Berrett-Koehler, 2008.
Dyfyniad MLAPolak, Paul. Out of Poverty: What Works When Traditional Approaches Fail. Berrett-Koehler, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.