Chairul Basri, author
Pustaka Sinar Harapan, 2003
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Simanjuntak, Leo, author
Universitas HKBP Nonmensen,
Artikel Jurnal
Kwik, Kian Gie, author
Gramedia Pustaka Utama, 1993
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The Asia Faundation, 2002
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Asyik Umar Said, author
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