Não informado. Quarterly economic review of Angola, Guinea Bissau, Cape Verde, Sao Tome & Principe. Economist Intelligence Unit.
Lua i Stíl Chicago (17ú heag.)Não informado. Quarterly Economic Review of Angola, Guinea Bissau, Cape Verde, Sao Tome & Principe. London: Economist Intelligence Unit.
Lua MLA (8ú heag.)Não informado. Quarterly Economic Review of Angola, Guinea Bissau, Cape Verde, Sao Tome & Principe. Economist Intelligence Unit.
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