Não informado. (1968). Commodity trade and price trends. International Bank for Reconstruction and Development.
Čikaški stil citiranja (17. izdanje)Não informado. Commodity Trade and Price Trends. Washington: International Bank for Reconstruction and Development, 1968.
MLA način citiranja (8. izdanje)Não informado. Commodity Trade and Price Trends. International Bank for Reconstruction and Development, 1968.
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