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Lua i Stíl Chicago (17ú heag.).Lewis, John P., agus Valeriana Kallab. U.S. Foreign Policy and the Third World: Agenda 1983. U.S.A: The overseas Development Council, 1983.
Lua MLA (9ú heag.).Lewis, John P., agus Valeriana Kallab. U.S. Foreign Policy and the Third World: Agenda 1983. The overseas Development Council, 1983.
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