(1989). Project evaluation criteria and cost-benefit analysis. Oxford.
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Dyfyniad Arddull Chicago
Project Evaluation Criteria and Cost-benefit Analysis. New Delhi: Oxford, 1989.
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Dyfyniad MLA
Project Evaluation Criteria and Cost-benefit Analysis. Oxford, 1989.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.