Surbakti, E. B., author
Elex Media Komputindo, 2009
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Nuri Susilowati, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1992
UI - Skripsi (Membership)
Trigilio, John
Karisma Publishing Group, 2007
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Knight, John F, author
Indonesia Publishing House, 2005
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Education USA,
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