APA Style
Nugroho, Yuliarto, Saragih, Ferdinand G, Sinaga, Mendjamin. ().
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Chicago Style
Nugroho, Yuliarto, Saragih, Ferdinand G, Sinaga, Mendjamin.
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MLA Style
Nugroho, Yuliarto, Saragih, Ferdinand G, Sinaga, Mendjamin.
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Turabian Style
Nugroho, Yuliarto, Saragih, Ferdinand G, Sinaga, Mendjamin.
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