Harms, R. W. (1974). Land tenure and agricultural development in Zaire, 1895-1961. Land Tenure Center, University of Wisconsin.
Lua i Stíl Chicago (17ú heag.)Harms, Robert W. Land Tenure and Agricultural Development in Zaire, 1895-1961. Madison: Land Tenure Center, University of Wisconsin, 1974.
Lua MLA (9ú heag.)Harms, Robert W. Land Tenure and Agricultural Development in Zaire, 1895-1961. Land Tenure Center, University of Wisconsin, 1974.
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