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Lua i Stíl Chicago (17ú heag.)Thorbecke, Erik, agus Jan Svejnar. Economic Policies and Agricultural Performance in Sri Lanka, 1960-1984. Paris, France, [Washington: Development Centre of the Organisation for Economic Co-operation and Development OECD Publications and Information Centre, 1987.
Lua MLA (9ú heag.)Thorbecke, Erik, agus Jan Svejnar. Economic Policies and Agricultural Performance in Sri Lanka, 1960-1984. Development Centre of the Organisation for Economic Co-operation and Development OECD Publications and Information Centre, 1987.