Ratnaesih Maulana, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1994
UI - Laporan Penelitian
Renan, Ernest, author
J.M. Dent & Sons LTD., 1945
Buku Teks
Parks, Walter, author
UnknownTruths.com, 2004
Buku Teks
Snouck Hurgronje, C. (Christiaan), 1857-1936, author
Hollandia Drukkerij, 1942
Buku Teks
Pfleiderer, Otto, 1839-1908
J.F. Lehmann, 1906
Buku Klasik