Luqman Hakim, author
Forum Studi Islam Surakarta (FSIS), 2004
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Ridwan Al-Makassary, author
Center for the Study of Religion and Culture (CSRC), UIN Syarif Hidayatullah Jakarta, 2007
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Tim Peneliti HI P31 Setjen DPR-RI, 2002
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Richard Bagun, author
Universitas Indonesia, 1988
UI - Skripsi (Membership)
Pakpahan, Baginda, author
Jurnal Studi Amerika, 2002
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