Organisation for Economic Co-operation and Development. (1991). United States: 1990/1991. OECD Publishing.
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Chicago Style (17th ed.) Zitazioa
Organisation for Economic Co-operation and Development. United States: 1990/1991. Paris: OECD Publishing, 1991.
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MLA (9th ed.) Zitazioa
Organisation for Economic Co-operation and Development. United States: 1990/1991. OECD Publishing, 1991.
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