(1990). The World Bank annual report 1990. The World Bank.
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Dyfyniad Arddull Chicago
The World Bank Annual Report 1990. Washington: The World Bank, 1990.
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Dyfyniad MLA
The World Bank Annual Report 1990. The World Bank, 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.