Dyfyniad APA

World Bank. (1990). The long-term perspective study of sub-Saharan Africa: Background papers. World Bank.

Dyfyniad Arddull Chicago

World Bank. The Long-term Perspective Study of Sub-Saharan Africa: Background Papers. Washington, D.C.: World Bank, 1990.

Dyfyniad MLA

World Bank. The Long-term Perspective Study of Sub-Saharan Africa: Background Papers. World Bank, 1990.

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