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Dyfyniad Arddull ChicagoBrenton, Paul, Olivier Cadot, and Martha Denisse Pierola. Pathways to African Export Sustainability. Washington, D.C.: World Bank, 2012.
Dyfyniad MLABrenton, Paul, et al. Pathways to African Export Sustainability. World Bank, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.