STEWART, R. G. (1992). Coffee: The political economiy of in export industry in Papua New Guinea. Westview.
Lua i Stíl Chicago (17ú heag.)STEWART, Randal G. Coffee: The Political Economiy of in Export Industry in Papua New Guinea. Boulder: Westview, 1992.
Lua MLA (9ú heag.)STEWART, Randal G. Coffee: The Political Economiy of in Export Industry in Papua New Guinea. Westview, 1992.
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