Jones, W. I. (1984). Farming systems in Africa: The Great Lakes highlands of Zaire, Rwanda, and Burundi. World bank.
Lua i Stíl Chicago (17ú heag.)Jones, William I. Farming Systems in Africa: The Great Lakes Highlands of Zaire, Rwanda, and Burundi. Washington: World bank, 1984.
Lua MLA (9ú heag.)Jones, William I. Farming Systems in Africa: The Great Lakes Highlands of Zaire, Rwanda, and Burundi. World bank, 1984.
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