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Dyfyniad Arddull ChicagoMarsden, David, and Peter Oakley. Evaluating Social Development Projects. Oxford: Oxfam, 1990.
Dyfyniad MLAMarsden, David, and Peter Oakley. Evaluating Social Development Projects. Oxfam, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.