Zuhal, author
UI-Press, 2000
Buku Teks
Needham, Joseph, author
Cambridge University Press, 1996
Buku Referensi
Agus Purwadianto ... [and others]
Teraju : Center for Spirituality & Leadership, 2004.
Buku Teks
Friedell, Egon
Alfred A. Knopf , 1954
Buku Teks
edited by Joachim Herrmann, Joachim Herrmann and Erik Zurcher
Routledge, 1996
Buku Referensi