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Lua i Stíl Chicago (17ú heag.)Roeder, O G comp. Who's Who in Indonesia: Biographies of Prominent Indonesian Personalities in All Fields. Djakarta: Gunung Agung, 1971.
Lua MLA (9ú heag.)Roeder, O G comp. Who's Who in Indonesia: Biographies of Prominent Indonesian Personalities in All Fields. Gunung Agung, 1971.
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