Parks, Walter, author
UnknownTruths.com, 2004
Buku Teks
Artikel Jurnal
Kasi, N.M.
International Association of Historians of Asia (IAHA), 1974
Buku Teks
Nurcholish Madjid ... [and others]
Gramedia Pustaka Utama, 1998
Buku Teks
Mochtar Buchori, author
Badan Penelitian dan Pengembangan Agama, Departemen Agama RI, 1979
Buku Teks