ebrary, Inc. (2006). The little green data book 2006. World Bank.
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Dyfyniad Arddull Chicago
ebrary, Inc. The Little Green Data Book 2006. Washington, D. C.: World Bank, 2006.
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Dyfyniad MLA
ebrary, Inc. The Little Green Data Book 2006. World Bank, 2006.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.