Pusat Penelitian: Universitas Mercu Buana, 2007
Majalah, Jurnal, Buletin
Jakarta : Pusat Penelitian Arkeologi Nasional
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Organization of the Petroleum Exporting Countries (OPEC), 2007
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Kiran Organise,
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Nanking (China) : The Council of International Affairs
Majalah, Jurnal, Buletin